The M3 Challenge is a contest that gives high schoolers the chance to experience working as a team to deal with a practical problem within limited time. The challenge is meant to give high schoolers a sense of the kinds of problems faced by professional mathematicians working in the real world. Students who are gifted at coding (编程) might consider this competition since extra credit awards are available for teams who include outstanding code as part of their solution.
High school juniors and seniors from anywhere in the U. S. are welcome to participate in the M3 Challenge. Teams of students must consist of three to five people and at least one teacher-coach. Another cool thing? The M3 Challenge is. entirely online until the final round, and there are no participation fees !.
At the end of the M3 Challenge, six teams are identified and invited to present their work in New York City. The finalist teams are also eligible to receive cash awards, which are as follows:
◆ M3 Challenge Champions (Summa Cum Laude Team Prize) $ 20,000
◆ M3 Challenge Runner Up (Magna Cum Laude Team Prize) $ 15,000
◆ M3 Challenge Third Place (Cum Laude Team Prize) $ 10,000
◆ M3 Challenge Finalist (Meritorious Team Prize) $ 5,000 (3 teams)
In addition to these top prizes, there are also awards in the amount of $ 1,500 and $ 1,000 for semi-finalist and honorable mention teams respectively. Finally, Challenge finalists, semi-finalists, and honorable mention teams may be invited to submit applications for summer internships in STEM.
1. What's the purpose of the M3 Challenge?| A．To promote coding. |
| B．To select math professionals. |
| C．To solve difficult math problems. |
| D．To enrich high schoolers' knowledge. |
| A．Having only one coach in a team. |
| B．Coming from a remote U. S. state. |
| C．Including eight students in a team. |
| D．Failing to pay the participation fees. |
| A．$ 1,000. | B．$ 1,500. | C．$ 5,000. | D．$ 10,000. |
相似题推荐
【推荐1】Join a Program This Summer?
Summer vacation is coming. Many universities provide summer programs for students to choose from. Here are some examples taken from the Internet.
University of Mississippi Summer Pre-College Program
The University of Mississippi is a community of learning devoted to improving excellence in intellectual development and personal character. Financial aid is available for students with academic talent as well as financial need. Schedules vary depending on program themes and types, but all days end with community time activities. For Summer College participants, weekend trips include visits to Memphis, Birmingham, and Atlanta.
Johns Hopkins University Summer Program
Johns Hopkins University Summer Program offers a comprehensive range of courses for college and pre-college students. Each course meets from 9 am to 4 pm, Monday through Friday, for two weeks. Because students spend all day in class, instructors do not assign much homework. Most students say in the pre-college dormitory, and participate in structured activities outside class time, including weekends. Students generally do not have a lot of unstructured free time in the two-week session.
St. John’s College Summer Academy
St. John’s College Summer Academy is a residential, pre-college program that engages students in discussion-based classes taught by college faculty. Organized in week-long sessions, each session is designed around a specific theme that explores important questions and ideas. A typical day includes classes, meals, extra-curricular activities such as croquet lessons, a reading group, or a yoga class, and possibly an outing. Weekend trips have included a visit to the National Gallery in Washington, D.C., and a performance at the Santa Fe Opera.
LIM College’s Summer Fashion Lab
LIM College’s Summer Fashion Lab is a comprehensive pre-college program that offers high school and college students the opportunity to study fashion at the college level, experience New York City, and test drive a college entirely devoted to the business of fashion. A typical day in Summer Fashion Lab involves students meeting for class in the morning, field trips to fashion museums and interactive in-class presentations!
1. What is one feature of University of Mississippi Summer Pre-College Program?| A．Financial aid | B．School dormitories |
| C．Academic discussion | D．Fashion classes |
| A．University of Mississippi Summer Pre-College Program |
| B．Johns Hopkins University Summer Program |
| C．St. John’s College Summer Academy |
| D．LIM College’s Summer Fashion Lab |
| A．Visits to Birmingham | B．Field trips to museums |
| C．Chances to join a reading group | D．Opportunities to watch an opera |
【推荐2】A new study of kids finds an association between heavy television use and poorer reading performance, as well as between heavy computer use and poorer numeracy—the ability to work with numbers. Lisa Mundy of the Murdoch Children’s Research Institute in Melbourne, Australia, and colleagues present their findings in the journal PLOS One.
Previous studies of children and adolescents have found links between the use of electronic media—such as televisions, computers, and video game players—and fatness, poor sleep, and other physical health risks. Electronic media use is also associated with better access to information, tech skills, and social connection. However, comparatively less is known about its links with academic performance.
To help clarify these links, Mundy and colleagues studied 1,239 8- to 9-year-olds in Melbourne. They used the data of a national achievement test to measure the children’s academic performance at baseline and again after two years. They also asked the children’s parents to report on their kids’ use of electronic media.
The researchers found that watching two or more hours of television per day at the age of 8 or 9 was associated with lower reading performance compared with the peers (同龄人) two years later; the difference equals losing four months of learning. Using a computer for more than one hour per day was linked to a similar degree of lost numeracy. The analysis showed no links between the use of video game players and academic performance.
These findings could help guide parents and teachers in planning kids’ screen time. The authors add, “The debate about the effects of modern media on children’s learning has never been more important given the effects of today’s pandemic on children’s use of time. This is the first large, long-time study of electronic media use and learning in primary school children, and the results showed heavy users of televisions and computers had a significant drop in reading and numeracy compared with light users. Future research could build on these results by examining continued associations in secondary schools.”
1. Mundy’s research focuses on the links between electronic media and____________.| A．people’s physical health risks | B．children’s performance in learning |
| C．adolescents’ mental health problems | D．video game lovers’ social connections |
| A．It was based on a lot of outdated data. |
| B．It involved children from all over Australia. |
| C．It was made with the assistance of parents. |
| D．It disproved many previous research findings. |
| A．Watching TV for two hours per day is harmless. |
| B．Heavy computer use can damage kids’ numeracy. |
| C．Video game players have better academic performance. |
| D．Children spend an average of two months a year on electronics. |
| A．Disappointing. | B．Questionable. | C．Unexpected. | D．Valuable. |
【推荐3】Many people tend to shy away from mathematics, considering it too difficult to understand and questioning its relevance in real life. However, this idea is incorrect. Mathematics is not as challenging as it may seem; on the contrary, it is both straightforward and appealing, functioning as a useful instrument in practical applications.
Mathematics serves as the foundation for all sciences, providing a framework for understanding the basic principles of the natural world. From physics and chemistry to bi ology and economics, mathematical ideas and formulas are like essential threads (线) woven (编织) into the exploration of science. Without a solid understanding of mathematics, it becomes challenging to figure out the mysteries of the universe and make meaningful contributions to various scientific fields.
As a matter of fact, the main reason why many people do not excel in mathematics is the widespread worry and unease. According to a survey by the National Science Foundation, nearly 60% of adults struggle with basic mathematical concepts. Overcoming this challenge requires a shift in mental attitude, emphasizing the importance of embracing mistakes as part of the learning process. Additionally, incorporating real-life applications and interactive methods into math education can enhance understanding and foster a positive learning environment.
For the development of the world, encouraging everyone to embrace the beauty of mathematics is more important than anything else. Rather than giving in to the belief that mathematics is never possible to conquer, individuals should approach it with curiosity and enthusiasm. By recognizing the practical applications of mathematics in everyday life and its indispensable role in advancing scientific knowledge, one can unlock its potential for personal and intellectual growth. Let us drive away the myth that mathematics is an abstract and useless subject, and instead, let’s embrace it as a powerful tool that opens doors to new possibilities and insights.
1. What is identified as the primary factor for people not good at mathematics?| A．Mathematics being too abstract. |
| B．Concern and anxiety related to the subject. |
| C．The research of our world only depending on a few scientists. |
| D．Lack of practical applications. |
| A．crucial | B．inessential | C．replaceable | D．predictable |
| A．Avoiding mistakes in the learning process. |
| B．Ignoring real-life applications in math education |
| C．Accept and welcome mistakes as part of the learning process. |
| D．Focusing solely on abstract mathematical concepts. |
| A．Mathematics: The Relevance of Mathematics in Everyday Life |
| B．Mathematics: A Challenging and Effective Subject |
| C．Mathematics: Full of Overwhelming Complexity |
| D．Mathematics: From Worries to Solutions |
【推荐1】All over the world people enjoy sports. Sports help to keep people healthy and happy，and to live longer.
Many people like to watch others play games. They buy tickets or turn on their TVs to watch the games. Often they get very excited when “their” player or team wins.
Some sports are so interesting that people everywhere go in for them. Football，for example，has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers. What fun it is to jump into a pool or lake，whether in China，Egypt or Italy！And think of people in cold countries. Think how many people love to skate or ski in Norway or Canada.
Some sports or games go back thousands of years，like running or jumping. Chinese wushu，for example，has a very long history. But basketball and volleyball are rather new. Neither one is a hundred years old yet. People are inventing new sports or games all the time. Waterskiing is one of the newest in the family of sports.
People from different countries may not be able to understand each other. But after a game together they may become good friends. Sports help to train a person's character. One learns to fight fair, to win without pride and to lose with grace.
1. Why do some people get excited when they watch a game?| A．Because their favourite team wins. |
| B．Because they win the game. |
| C．Because they get the good news. |
| D．Because they can't help themselves. |
| A．Waterskiing. | B．Basketball. |
| C．Sailing. | D．Jumping. |
| A．气馁 | B．失望 |
| C．开心 | D．风度 |
| A．People like catching fish |
| B．People are interested in jumping |
| C．People enjoy themselves swimming in the water. |
| D．People feel happy when washing in the water |
【推荐2】The excitement of the FIFA World Cup in Qatar is truly ongoing. It’s the world’s biggest international soccer tournament(比赛)and also the most-watched sporting event in the world. There are 32 teams competing for championship. The tournament of 2022 looks to be particularly unique. What makes it different from the ones before?
For starters, it’s the first time the tournament has been held in the Middle East after Qatar beat other host competitors − the US, South Korea, Japan and Australia back in 2010. It’s also the first time in history the tournament has happened during the Northern Hemisphere(北半球)winter months, from Nov 20 to Dec 18.
That’s because Qatar is a desert country, and in summer the temperature can be as high as 42 ℃. That’s too hot to play outdoor sports. But it will still be pretty warm in winter. The temperature in the stadium is expected to be around 20 ℃ to 30 ℃. Air conditioning will help to keep it cooler.
Qatar is also the smallest nation by area hosting the cup. They play the first match of the tournament, facing Ecuador. It’s Qatar’s first-ever FIFV World Cup game. This makes them the first to perform their debut(首秀)game since Italy in 1934!
There are some new challenges for many players too. Apart from the hot weather, for European teams like England, France, Germany and Spain, it’s only just over a year since their last big international tournament, the UEFA Champions League.
According to FIFA’s rankings, the favorites to win the tournament this year are Brazil, followed by Argentina and France. Do you know who has had the last laugh?
1. What can we learn about FIFA World Cup?| A．It is held every year. |
| B．It is the biggest international football tournament. |
| C．It is disliked by countries in the Middle East. |
| D．It is the most-watched sporting event only in Qatar. |
| A．32. | B．4. | C．5. | D．3. |
| A．It is the first time it has been held in Asia. |
| B．It is the first time Qatar and Italy have had a debut game. |
| C．It is the first time the players have met no problems. |
| D．It is the first time it has happened from November to December. |
| A．The FIFA World Cup | B．Qatar’s Unique World Cup |
| C．The Popularity of FIFA | D．The Development of Football |
【推荐3】While the remaining 8 teams of the FIFA World Cup 2022 in Qatar compete in the quarter-finals, it is worth noting that it is not only soccer that has captured the world’s attention, but also the video assistant referee (VAR) technology.
Like it or hate it, the VAR is a part of football games today.
Many football fans question whether the system made the game better or if it added unnecessary some complication to the beautiful game, especially this time in Qatar, as a number of controversial (引起争议的) decisions were made involving VAR – it slows down the game, offside law (越位规则) is sometimes not flexible.
The introduction of the VAR means at the top-level football now tends to pause and delay with the on-field referee often waiting for decisions to be made by those located in offices often far away from the stadiums themselves.
Actually, the use of video match officials (VMOs) in football was included in the 2018/2019 edition of the Laws of the Game and was already used at the 2018 FIFA World Cup. Since then, the system has been used in over 100 competitions worldwide.
Despite criticisms, FIFA thought VAR’s first show to be a success, with referee committee head Pierluigi Collina claiming that 99.3 percent of “match-changing” decisions were called correctly at the World Cup – “very, very close to perfection”. Without VAR, referees called 95% of incidents correctly.
We should admit that sports tech is still far from perfect in the field of sports events. People’s emotions are not towards those technologies themselves, but the current shortcomings of the application of the technology.
The controversies in the football field are not caused by VAR alone as there are too many uncertain factors on the court, which is a part of the game drama. For example, the penalty kick (点球) in the penalty area is judged in a variety of situations.
1. What made fans dissatisfied in Qatar?| A．The use of VAR technology. |
| B．The results of soccer games. |
| C．The changes of match laws. |
| D．The decisions made by coaches. |
| A．Viewer. | B．Athlete. | C．Judge. | D．Host. |
| A．It reduces the burden of the referees. |
| B．It has become a part of football games. |
| C．It is widely applied in many fields of sports. |
| D．Its “match-changing” decisions proved more exact. |
| A．World Cup 2022 is a turning point |
| B．Is VAR technology ruining football games? |
| C．Should VAR be popularized in the sports world? |
| D．The 2022 World Cup saw the first show of VAR |
【推荐1】If you think about World Heritage Sites, you probably think of places connected with ancient art and culture, historical buildings and monuments. And of course, many of these are on the World Heritage List (WHL) (世界遗产名录). But the WHL contains a lot of sites that are not so obvious. Let’s look at a few of them.
Robben Island in South Africa
This island was used through the centuries as a prison, a hospital and a military base. But it’s probably most famous as a maximum-security prison for political prisoners in the twentieth century. Nelson Mandela was one of its most famous residents. The WHL says it represents “the triumph of democracy (民主) and freedom over oppression and racism”.
Borders of France and Spain
This is an area of great natural beauty and the mountains have many interesting geological formations. But it is also an area of small farms. People there still use a type of agriculture (农业) that used to be common in mountainous areas of Europe but that has almost completely disappeared in modern times.
The city of Brasilia, Brazil
Brasilia is a capital city that was created from nothing in 1956. The WHL calls it “a landmark in the history of town planning”. The different areas of the city and the buildings themselves were all designed at the same time carefully. Every part of the city shows the ideas of the planner and architect.
Simien National Park, Ethiopia
Simien National Park was one of the first sites to be listed in 1978. It is one of the highest mountainous areas in Africa, and the WHL calls it “one of the most spectacular landscapes in the world”. It is also important for its wildlife. The population of some rare animals is getting smaller and smaller.
1. Which of the following sites was listed on the WHL for its political symbol?| A．Simien National Park, Ethiopia. | B．The city of Brasilia, Brazil. |
| C．Borders of France and Spain. | D．Robben Island in South Africa. |
| A．it shows us past European society by the type of agriculture |
| B．this is an area of great natural beauty |
| C．the mountains there have many interesting geological formations |
| D．people there still use a type of agriculture that is common in Europe in modern times |
| A．Robben Island in South Africa. | B．The city of Brasilia, Brazil. |
| C．Borders of France and Spain. | D．Simien National Park, Ethiopia. |
| A．the remains of ancient cultures on the WHL |
| B．the household heritage sites on the WHL |
| C．some of the less well-known sites on the WHL |
| D．important places of art and culture |
【推荐2】
JOHN WINSTER
6:30 pm——11:00 pm Free at the Minack Theatre.
Do you know who’s playing in your district? We’re bringing you an exciting evening of live rock and pop music from the best local bands. Are you interested in becoming a musician and getting a recording contract? If so, come early to the talk at 6:30pm by Jules Skye, a successful record producer. He’s going to talk about how you can find the right person to produce your music.
DAVID BROWN
7:00 pm——11:30 pm Comedy at the Novella Theatre.
Come and see David Bremen perform. He’s the funniest stand-up comedian on the comedy scene. This joyful show will please everyone, from the youngest to the oldest. David Bremen really knows how to make you laugh! Our bar is open from 6:30pm for drinks and fine foods.
BENJAMINS STUDIO
5:30pm——8:00pm Thursdays at the Royal Opera House
This is a good chance for anyone who wants to learn how to do comedy. The workshop looks at every kind of comedy, and practices many different ways of making people laugh. Simon is a comedian and actor who has 10 years’ experience of teaching comedy. His workshops are exciting and fun. An evening with Benjamin will give you the confidence to be funny.
RED SCARF
7:30pm——11:30pm City Music World
Fine food with beautiful jazz music is a great evening out. Red Scarf perform songs from her new best-selling CD, with Stephen Hough on the piano. The menu is Italian, with excellent meat and fresh fish, pizzas and pasta (面食). Book early to get a table. Our bar is open all day, and serves cocktails, coffee, beer and white wine.
1. Who can help you if you want to have your music produced?| A．Jules Skye. | B．David Brown. |
| C．Red Scarf. | D．Stephen Hough. |
| A．The Minack Theatre. | B．The Novella Theatre. |
| C．The Royal Opera House. | D．City Music World. |
| A．It is held every Thursday. | B．It is run by a famous club. |
| C．It lasts two hours each time. | D．It requires membership status. |
| A．Listen to Red Scarf’s best-selling CD. |
| B．Learn how to play the piano. |
| C．Read books while waiting for a table. |
| D．Enjoy foods of Italian flavors. |
| A．To advertise four places for people to eat out. |
| B．To call on people to join four clubs. |
| C．To introduce four places for entertainment. |
| D．To show four famous artists in theater performance. |
【推荐3】Teenagers like to keep themselves entertained every moment of their free time. The following are some fun, interesting games teenagers can play when they have a get-together. Check out these indoor group activities for teenagers that will be super fun to play with your friends:
● Foot Volleyball:
You will need: balloon, a volleyball net
1. Ask all participants to remove their shoes and form two groups.
2. Hang the net in such a way that it is at least 1 meter above the floor. Let both the teams take their positions on each side of the net.
3. Players now need to play volleyball with the balloon using their feet instead of their hands!
● Who Am I?
You will need: sticky notes, a pen
How to:
1. Write down a famous character or celebrity name on a note.
2. Stick the note on one player’s forehead so that he or she cannot see it.
3. The player then asks questions to group members, for which they should either answer yes or no.
4. He or she should finally try to guess the character.
5. Each player gets a maximum of three attempts to guess the name.
● I Went to Camp:
How to:
1. The leader begins the game by saying “I went to camp, and I took a/an (object)”.
2. The player sitting next to him or her will repeat the same phrase but with another object.
3. The trick is, the objects should follow a pattern such as alphabetical (按字母顺序的) order.
1. In Foot Volleyball, all of the following are needed, except ______.| A．a volleyball | B．a balloon | C．to remove shoes | D．to form two groups |
| A．Through their teammates’ acting. | B．Through their teammates’ description. |
| C．By reading out the clues. | D．By asking yes or no questions. |
| A．They all need a pen. | B．They all can be done indoors. |
| C．Groups should be formed. | D．All participants should understand English. |
Babies don't learn to talk just from hearing sounds. They are lipreaders too. It happens during the stage when a baby's babbling (咿呀声) gradually changes from unclear voices into that first “mama” or “dada”. The baby in order to do like you has to figure out how to shape their lips to make that particular sound they are hearing, according to developmental psychologist David Lewkowicz of Florida Atlantic University, who led the study.
Apparently it doesn't take them too long to absorb the movements that match basic sounds. By their first birthdays, babies start changing back to look you in the eye again. It offers more evidence that quality facetime with babies is very important for speech development more than, say, turning on the latest baby DVD.
But Lewkowicz went a step further. He and his student Amy HansenTift tested nearly 180 babies, groups of them at ages 4,6,8,10 and 12 months. How? They showed videos of a woman speaking in English or Spanish to babies of English speakers. They found that when the speaker used English, the 4montholds gazed mostly into her eyes. The 6montholds spent equal amounts of time looking at the eyes and the mouth. The 8and 10montholds studied mostly the mouth. At 12 months, attention started changing back toward the speaker's eyes.
But what happened when these babies accustomed to English heard Spanish? The 12montholds studied the mouth longer, just like younger babies. They needed the extra information to recognize the unfamiliar sounds. That fits with research into bilingualism (双语) that shows babies' brains adjust themselves to distinguishing the sounds of their native language over other languages in the first year of life.
The continued lipreading shows the 1yearolds clearly still are fit for learning. Babies are so hard to study that this is “a fairly heroic data set”， says Duke University cognitive neuroscientist Greg Appelbaum, who found the research so fascinating that he wants to know more.
1. According to the first paragraph, babies________.
| A．might get its voice “mama” by lipreading |
| B．learn to talk just from hearing the sounds |
| C．like to figure out how to shape their lips |
| D．communicate with parents through gestures |
| A．Playing baby DVD nearby. |
| B．Teaching babies to read English. |
| C．Speaking with babies face to face. |
| D．Speaking different languages in front of babies. |
A． | B． | C． | D． |
| A．Babies Have Different Methods to Talk |
| B．Babies Try Lipreading in Learning to Talk |
| C．Babies Are Suitable to Learn Two Languages |
| D．Babies Can Easily Accept Foreign Language |
【推荐2】Specialists say that it is not easy to get used to life in a new culture. “Culture shock" is the term these specialists use when talking about the feelings that people have in a new environment. There are three stages of culture shock, say the specialists. In the first stage, the newcomers like their new environment. Then, when the fresh experience dies, they begin to hate the city, the country, the people, and everything else. In the last stage, the newcomers begin to adjust to their surroundings and, as a result, enjoy their life more.
There are some obvious factors in culture shock. The weather may be unpleasant. The customs may be different. The public service systems-the telephone, post office, or transportation-may be difficult to work out. The most simple things seem to be big problems. The language may be difficult.
Who feels culture shock? Everyone does in this way or that. But culture shock surprises most people. Very often the people having the worst culture shock are those who never had any difficulties in their home countries and were successful in their community. Coming to a new country, these people find they do not have the same established positions. They find themselves without a role, almost without an identity. They have to build a new self-image.
Culture shock gives rise to a feeling of disorientation(迷惘). This feeling may be homesickness. When homesick, people feel like staying inside all the time. They want to protect themselves from the strange environment, and create and escape inside their room for a sense of security. This escape does solve the problem of culture shock for the short term, but it does nothing to make the person familiar with the culture. Getting to know the new environment and gaining experience-these are the long term solutions to the problem of culture shock.
1. When people move to a new country, they______| A．will get used to their new surroundings with difficulty |
| B．have well prepared for the new surroundings |
| C．will get used to the culture of the country quickly |
| D．will never be familiar with culture of the country |
| A．language communication | B．weather conditions and customs |
| C．public service systems | D．homesickness |
| A．the fewer difficulties you may have abroad | B．the more difficulties you may have abroad |
| C．the more money you will earn abroad | D．the less homesick you will feel abroad |
| A．to escape unfamiliar environment | B．to overcome the feeling of homesickness |
| C．to stay inside all the time | D．to get familiar with the new culture |
【推荐3】Dreaming of summer picnics filled with family and fun? We’ve come up with 4 of the top picnic areas across the US.
Cumberland Islands, Georgia
Just a few hours south of Savannah, this national seashore is a wonderful picnic place. It’s an unspoiled place in the Deep South with over 50 miles of hiking trails (小径). Covered in Spanish moss, the trails are lined with trees and since it’s still a rural area, the stars line up for a grand show at night and create the perfect evening starlit picnic opportunity.
Grant Park, Chicago
If you are looking for delicious food in Chicago, go for a taste of a 20-day, lake-front, foodie festival that happens in October each year. Grab a spot near the fountain to enjoy your picnic, appreciate the city scenery and lake views and relax with family and friends. If you are there on July 4th, be sure to plan the day to include the fireworks display at the Navy Pier.
Cranberry Islands, Maine
Here, you’ll enjoy natural picnics with island views. The islands are a delightful group of islands about 20 minutes offshore from Acadia National Park. You can visit the islands by private boat or ferry service. Bring a picnic basket along for the ride as it’s a romantic picnic area to take your special someone or go for a family outing to visit the islands.
Big Sur, California
The Point Lobos State Reserve is a small gem. Besides the coastal wildlife there are rare plant communities, and unique geological formations. It’s good to have a picnic there. We recommend bringing a telescope, because much of the wildlife can be seen only at a distance.
1. Why does the writer advise us going to Cumberland Islands?| A．Because they are just next to Savannah. |
| B．Because they keep their original ecology (生态). |
| C．Because they are almost covered in Spanish moss. |
| D．Because they have a grand show every night. |
| A．At the Navy Pier. | B．In the Deep South. |
| C．At Acadia National Park. | D．At the Point Lobos State Reserve. |
| A．To introduce some picnic areas in the US. |
| B．To share personal stories about picnics. |
| C．To tell readers some good ways to relax. |
| D．To offer readers tips for summer holiday. |
| A．In a personal dairy. | B．In a science report. |
| C．In a travel magazine. | D．In a geography textbook. |
