1 . Barbara McClintock was one of the most important scientists of the 20th century. She made important discoveries about genes and chromosomes(染色体).
Barbara McClintock was born in 1902 in Hartford, Connecticut. Her family moved to the Brooklyn area of New York City in 1908. Barbara was an active child with interests in sports and music. She also developed an interest in science.
She studied science at Cornell University in Ithaca, New York. Barbara was among a small number of undergraduate students to receive training in genetics in 1921. Years later, she noted that few college students wanted to study genetics.
Barbara McClintock decided to study botany, the scientific study of plants, at Cornell University. She completed her undergraduate studies in 1923. McClintock decided to continue her education at Cornell. She completed the master’s degree in 1925. Two years later, she finished all her requirements for the doctorate degree.
McClintock stayed at Cornell after she completed her education. She taught students botany. The 1930s was not a good time to be a young scientist in the United States. The country was in the middle of the great economic depression. Millions of Americans were unemployed. Male scientists were offered jobs. But female geneticists were not much in demand.
An old friend from Cornell, Marcus Rhoades, invited McClintock to spend the summer of 1941 working at the Cold Spring Harbor Laboratory. It is a research center on Long Island, near New York City. McClintock started a temporary job with the genetics department. A short time later, she accepted a perpetual position in the laboratory and got continual incomes. This gave her the freedom to continue her research without repeatedly asking for financial aid.
By the 1970s, her discoveries had had an effect on everything from genetic engineering to cancer research. McClintock won the Nobel Prize for Physiology or Medicine in 1983 for her discovery of the ability of genes to change positions on chromosomes. She was the first American woman to win an unshared Nobel Prize.
1. When did McClintock get a doctorate degree?| A．In 1921. | B．In 1923. | C．In 1925. | D．In 1927 |
| A．male scientists were in great demand |
| B．male scientists were out of work |
| C．female geneticists were not in demand at all |
| D．young female scientists might have trouble finding a job |
| A．A permanent position in the laboratory. |
| B．A temporary job in the genetics department. |
| C．A job as a botany teacher. |
| D．A job to research cancer. |
| A．Because she received a degree in genes and chromosomes. |
| B．Because she contributed to genetic engineering and cancer research. |
| C．Because she made important discoveries about genes and chromosomes. |
| D．Because she was the first American woman who studied genes and chromosomes. |
2 . Almost all theme park accidents can be prevented．Here, based on coverage of theme park safety, are some tips to help you and your family stay safe on your next visit．
If you are visiting with a child, take a moment to explain the ride to them, and tell them how they should behave．They are depending upon you to keep them safe．Set a good example for them by following the rules of the park, and make sure that they know you expect them to follow those rules, too．
Tell them to stay seated, to hold the grab bar or put their hands in the laps, and not to stick their knees and feet outside a ride vehicle．Make them look to you for the okay to get on or off a ride, too．
And never put a crying child on a ride．If your child starts to cry, let others pass you in line until your child is calmed．Or, gently exit the queue and find something more relaxing to do．
Young kids can’t keep an adult’s pace in a theme park．Let them take plenty of breaks．
“Kids get tired,” said TPI reader Matt Johnson, a father of four．“Tired kids make parents even more tired．And tired kids and parents may get hurt — physically and emotionally．” He advises that parents plan a mid-day break, perhaps a swim back at the hotel, to avoid mid-day heat and crowds．“You will see cranky families having a miserable time while you are refreshed and having a great evening．”
1. The second paragraph tells readers that ________．| A．children should be trained to be more independent |
| B．adults should set a good example to behave well in a theme park |
| C．adults should tell children some safety rules firstly |
| D．there is a danger to take young children to visit a theme park |
| A．tell him to be relaxed | B．give up the present activity |
| C．make him share your interest | D．encourage him to be brave |
| A．he doesn’t like to visit a theme park with his children |
| B．not all the families are relaxed or happy when they visit a theme park |
| C．parents with many children may be tired of visiting a theme park |
| D．visitors should arrange everything carefully before starting |
3 . A painting stamped with more than 4.8 million fingerprints and cost over 80, 000 yuan in paper has set the Guinness World Record for the largest fingerprint painting.
The fingerprint painting, named Descendants of the Dragon, was created by Kuang Xianpeng, a 35-year-old painter from Zhuzhou, Hunan Province. It describes a mix of nine Chinese dragons and six arts in ancient Chinese culture.
With a surface area of 1195. 14 square meters, 51. 526 meters long and 23. 195 meters wide, the whole painting used 685 pieces of xuan paper and took Kuang over two years to complete. It also took 40 volunteers two whole days to lay out the painting for Guinness certification officer to measure.
Kuang said it was a very arduous journey, and he had used up all his spare time to finish the work. “It was very hard to master the amount of strength you put in your fingers, ” he said. “You can’t press too hard or too light. Otherwise, your prints will blur. I have wasted over 300 pieces of paper due to blurred fingerprints. ”
The Guinness certification officer Luo Qiong said this world record wasn’t easy to earn. She said each fingerprint must be clear, the painting must have more than four different colors, and the distance between each fingerprint mustn’t be more than 1 centimeter.
The world record for this category had been broken 15 times since 2014, with the previous one set by an Indian with a work measuring 1, 188 square meters.
Before this painting, Kuang had spent 14 years in drawing a pen-and-ink painting of 247 meters long and 1. 6 meters wide, telling stories of historical myths. He also said he would never stop exploring more creative works.
1. What can we know about the painting created by Kuang Xianpeng?| A．It’s worth at least 80, 000 yuan. |
| B．It measures 1, 188 square meters. |
| C．It took him 14 years to complete it. |
| D．It consists of over 4.8 million fingerprints. |
| A．Difficult. | B．Satisfying. |
| C．Thrilling. | D．Frightening. |
| A．The colors of paints. |
| B．The amount of strength. |
| C．The quality of xuan paper. |
| D．The distance of fingerprints. |
| A．He is full of creativity. |
| B．He is full of imagination. |
| C．He is very courageous. |
| D．He is rich in experience. |
4 . No human has set foot on the Moon since 1972. Now, after more than four decades of inactivity, interest in putting humans back on the Moon is finally heating up again. But who will get there first?
CHINA
On 14 December 2013, China successfully landed its Jade Rabbit rover(探测车)on the Moon. It is now working on its next exploration mission. Named Chang’e 4, the mission is scheduled to touch down in the Aitken Basin near the end of 2018. If successful, it will be the first landing on the Moon’s far side.
RUSSIA
Russia plans a manned Moon landing in 2030. It is currently working on a project whose idea is that the landers will explore the south pole of the Moon, exploring for resources such as minerals and water ice to be used to provide for a human outpost(前哨站).
INDIA
Following the success of its Chandrayaan-1 in 2008, India announced a follow-on mission. Chandrayaan-2 was meant to cooperate with Russia. But when the Russians failed to deliver the promised lander in 2013, India decided to go it alone. Chandrayaan-2 is about to be sent up in 2018.
U. S. A.
In December 2018, NASA plans to send up the Exploration Mission 1, an uncrewed test of their Orion astronaut capsule in which the craft will circle around the Moon before returning to Earth. All being well, a crewed capsule will follow in 2023. Should the mission prove a success, the astronauts will be the first humans to see the far side of the Moon with their own eyes since Apollo 17 in 1972.
1. What will China do in its next space mission?| A．Improve its Jade Rabbit rover. |
| B．Work with other countries. |
| C．Land Chang’e 4 on the Moon. |
| D．Explore the south pole of the Moon. |
| A．It couldn’t find a partner. |
| B．It didn’t get the lander as planned. |
| C．The Russians refused to work with India. |
| D．It planned to launch Chandrayaan-2 in advance. |
| A．Russia. | B．China. | C．India. | D．U. S. A. |
5 . Learning a second language is difficult at any age and it only gets harder the longer you wait to open that dusty French book. Now, in a new study, scientists have pointed the exact age at which your chances of reaching fluency（流利）in a second language seem to rise： 10.
The study, published in the journal Cognition, found that it's "nearly impossible” for language learners to reach native-level fluency if they start learning a second language after 10. But that doesn't seem to be because language skills go downhill “It turns out you're still learning fast. It's just that you run out of time, because your ability to learn starts dropping at around 17 or 18 years old,“ says study co-author Joshua Hartshorne, an assistant professor of psychology at Boston College.
Kids may be better than adults at learning new languages for many reasons. Children's brains are more plastic than those of adults, meaning they're better able to adapt and respond to new information. "All learning involves the brain changing,“ Hartshorne says, “and children's brains seem to be a lot more skilled at changing. "
These findings may seem discouraging, but it was heartening for scientists to learn that the critical （关键的）period for fluent language acquisition might be longer than they previously thought. Some scientists believed that the brief window closes shortly after birth, while others stretched it only to early adolescence. Compared to those estimates, 17 or 18 when language learning ability starts to drop off——seems old.
“People progress better when they learn by immersion （沉 浸）rather than simply in a classroom. And moving to a place where your desired language is spoken is the best way to learn as an adult. If that's not an option, you can create an immersive environment by finding ways to have conversations with native speakers in their own communities," Hartshorne says. By doing so, it's possible to become conversationally fluent——even without the advantage of a child's brain.
1. What is the most important finding of the new study?| A．The best age to learn a second language. |
| B．The possibility of speaking fluent language. |
| C．The change of language skills over the time. |
| D．The great approaches to learning a language. |
| A．Their focus is language learning only. |
| B．They are more interested in languages. |
| C．They are more adaptable to new things. |
| D．Their brain always ignores big changes. |
| A．Joining friends in their learning. | B．Turning to immersive learning. |
| C．Studying in a quiet classroom. | D．Training the brain to a kid's brain. |
| A．Science. | B．Travel |
| C．Health. | D．Education. |
6 . Now many young people are traveling around the world on their own, not because they have no one to travel with, but because they prefer to go alone.
Kristina Wegscheider from California first traveled alone when she was at college and believes that it is something everyone should do at least once in their life. “It opens up your mind to things and pushes you out of your comfort zone.” Wegscheider has visited 46 countries covering all seven continents.
In foreign countries, with no one to help you read a map, look after you if you get ill, or lend you money if your wallet is stolen, it is challenging. This is what drives young people to travel alone. It is seen as character building and a chance to prove that they can make it on their own.
Chris Richardson decided to leave his sales job in Australia to go traveling last year. He set up a website, The Aussie Nomad, to document his adventures. He says he wished he had traveled alone earlier. “The people you meet, the places you visit, or the things you do, everything is up to you and it forces you to grow as a person.” said the 30-year-old man.
Richardson describes traveling alone like “a shot in the arm”, which “makes you a more confident person that is ready to deal with anything”. He said, “The feeling of having overcome something on my own is a major part of what drives me each day when I’m dealing with a difficult task. I walk around with my head up because I know deep down inside that nothing is impossible if you try.”
The great 19thcentury explorer John Muir once said. “Only by going alone in silence can one truly get into the heart of the wilderness.
1. Which of the following will Kristina Wegscheider agree with?| A．Traveling alone is a necessary experience for everyone. |
| B．It is more meaningful to travel in foreign countries. |
| C．It is comfortable to travel around without a friend. |
| D．Traveling abroad helps people to find new things. |
| A．you have to make things on your own. |
| B．it is hard for you to prove yourself to others. |
| C．you can only depend on yourself whatever happens. |
| D．it will finally build your character. |
| A．He started traveling alone at an early age. |
| B．He was once shot in the arm. |
| C．He used to work as a salesman. |
| D．His website will inspire others to travel alone. |
| A．Travel Abroad | B．Travel Alone |
| C．Travel Light | D．Travel Wide and Far |
7 . The Internet is a growing new world that has been developing ever since it was created many years ago. The only reason Internet sales are not taxed（征税）is because we did not know the Internet would be used to sell products when it was created. Internet sales are no different than going into the store to buy the exact same product except for the fact that Internet sales are not taxed.
When buying online， people cannot see and touch the product the same way they could in a store. To fix this， customers are going into the store to see the product. Then if they like the product， they buy it online to save money on the sales tax. This is a form of tax evasion（逃税）if you ask me！
Everyone has to pay the tax in the store so they should have to pay taxes online as well. Also，the added money brought in through Internet taxing could help the government to fund certain policies and other things that they could not do without the added funds. This could go toward the country's schools or other things necessary for society to function well. These funds could be extremely beneficial because of the recession（经济衰退）that the country is in at this point. Internet taxing is a way to increase those funds and in turn improve the quality of life for all who live in that country.
In conclusion， there are many more positives than negatives in the argument over taxing Internet sales. I do understand that I may have to pay more if I want to buy something online， but the funds stay within my society and help my country. The added cost may hurt me at first but in the end， the funds will help me and others in our country.
1. The text mainly discusses .| A．whether Internet sales should be taxed |
| B．why Internet sales are not taxed |
| C．why people love to buy things online |
| D．whether it is a good way to buy things online |
| A．they are different from store sales | B．selling online was unexpected |
| C．people don't know how to tax them | D．many people are against taxing them |
| A．Customers get better products at a lower price online. |
| B．Online shoppers find it difficult to buy satisfactory goods. |
| C．Online shoppers probably try to avoid paying tax. |
| D．Problems related to online shopping are hard to fix. |
| A．is good for all people |
| B．can help the country out of the recession |
| C．can help improve the quality of products |
| D．is beneficial to the development of Internet |
8 . In my everyday life, I am on an ongoing journey to figure out different ways to reduce my carbon footprint on the planet. A carbon footprint is the measure of influence our activities have on the environment, in particular climate change. It is calculated by the amount of greenhouse gas we produce in our daily lives. Fortunately, nowadays it is much easier to make eco-friendly lifestyle choices than, let's say, 20 years ago. But one question has been on my mind a lot lately: is it better to buy new eco-friendly products or used traditionally produced goods?
After doing some research, I have decided that some things are better new and others are better used. Let me try to explain.
A carbon footprint is made up of two parts, the primary footprint and the secondary footprint. The primary footprint is a measure of our direct emissions(排放)of carbon dioxide(CO2)from the burning of fuels, including household energy consumption and transportation. The secondary footprint is a measure of the indirect CO2 emissions from the whole lifecycle of products we use-those related to their production and breakdown.
Based on this understanding, we have a good deal of control and responsibility over our carbon footprint. Things like dishes, clothes and furniture fall into the “secondary footprint” group, so less is more and we can focus on finding used goods to avoid the added production. However, for the car and the other appliances(设备)that we need we can go with new, energy-saving models. I heard somewhere that electronics and appliances give off 90% of their carbon footprint after they leave the factory. So it seems most reasonable to go for the energy-saving models. The main concern here is the amount of energy that goes into the making of new products and whether or not that extra carbon is worth the footprint the product will make once it gets to you.
1. What is the text mainly about?| A．What appliances to buy to save energy. |
| B．What a carbon footprint means in our life. |
| C．How to identify different carbon footprints. |
| D．How to make eco-friendly lifestyle choices. |
| A．It is related to our consumption of fuels. |
| B．It is made when we are buying the products. |
| C．It is less harmful than the primary carbon footprint. |
| D．It is counted as ours though not directly made by us. |
| A．Using second-hand textbooks. | B．Using old and expensive cars. |
| C．Buying new but cheap clothes. | D．Buying new wooden furniture. |
| A．using the product | B．recycling the product |
| C．making the product | D．transporting the product |
9 . After an earthquake most survivors can be expected to recover over time, particularly with the support of family and friends. Some families will be able to return to their normal life quickly, while others will have to contend with the destruction of their homes, medical problems, and injury to family members. Children especially will need time to recover from the loss of a loved one or a pet or from the closing down of their school.
Children often turn to adults for information, comfort and help. Parents should try to remain calm, answer children’s questions honestly and remain understanding when they see changes in their children’s behavior.
Children react differently to an earthquake depending on their ages, developmental levels and former experiences. Some will respond by withdrawing (不与人交往), while others will have angry outbursts (爆发). Parents should remain sensitive to each child’s reactions. Parents should spend time talking to their children，letting them know that it’s OK to ask questions and to share their worries. Although it may be hard to find time to have these talks, parents can use regular family mealtimes or bedtimes for them. They should answer questions briefly and honestly and be sure to ask their children for their opinions and ideas. Issues may come up more than once and parents should remain patient when you answer the questions again. For young children, parents, after talking about the earthquake, might read a favorite story or have a relaxing family activity to help them calm down. Parents should also tell children they are safe and spend extra time with them. They could play games outside or read together indoors. Most importantly, be sure to tell them you love them.
1. The underlined phrase “contend with” in Paragraph 1 can be replaced by “________”.| A．deal with | B．make up | C．put off | D．turn back |
| A．read a favorite story to comfort them |
| B．ask them to help do some housework |
| C．be patient and answer the question again |
| D．take them out to play games |
| A．Keep a close watch on children’s behavior. |
| B．Tell the children they are safe. |
| C．Tell the children you love them. |
| D．Ask educational experts for help. |
| A．All people will recover from an earthquake quickly. |
| B．Children may need a longer time to recover after an earthquake. |
| C．Children should turn to their classmates for help after an earthquake. |
| D．Children react in the same way as adults do to an earthquake. |
10 . Do you like running enough to make it a habit? Tierney Wolfgram does; she has made running a lifelong career and isn't stopping.
In February, the 16-year-old from a high school, US, competed at the 2020 US Olympic Trials. She finished the marathon(42.195 km)with a time of 2:42:47 as the youngest competitor in the race and ranked 76th out of 390 runners. However, the cross-country(越野的)season was postponed to winter because of the COVID-19. So she jumped at the opportunity to train for another race-the Parkway Marathon in California. In November, Wolfgram broke the Women's American Junior marathon record with her time of 2:31:49. The old record was 2:34:32, which had stood since 1984.
“I'm completely stunned, ”said Wolfgram's coach. “I knew she was going to break it, but she really showed out！”
During the run, Wolfgram once hit a wall pretty hard, but she overcame it to finish. “I guess I can say I gave it my all, ”she told Runner's World. “When I finished, all I was thinking was I felt super happy,” Wolfgram said This was only her third marathon. In 2018, when Wolfgram was 15 years old, she ran her first marathon just because she wanted to see if she had the ability to do it. “I believed that I would get faster as the distances got longer. . . I'm still glad that I did it. ”
When preparing for that first marathon, she ran up to 120 miles per week. Although her parents didn't have any background in running, they helped Wolfgram train. At first, her dad would take her out in the morning and run about 13 miles. The distance would gradually increase each day. On top of her runs in the morning, she would do cross-country practice after school.
Now Wolfgram will consider attending the Olympics Games in 2024 after it's scheduled.
1. What can we learn about Wolfgram from Paragraph 2?| A．She was the champion at the 2020 US Olympic Trials. |
| B．She put off the cross-country season for the COVID-19. |
| C．She broke an Olympic marathon record in November. |
| D．She prepared for the Parkway Marathon in California. |
| A．Doubtful | B．Worried. | C．Shocked. | D．Interested |
| A．Her parents' encouragement. | B．Her desire to prove she could do it. |
| C．Her coach's support and help. | D．Her hope to break the national record |
| A．Sports. | B．Lifestyle | C．Culture. | D．Opinion |
