1 . Twelve-year-old Catherine has a lot of friends—632, actually, if you count up her online friends. And she spends a lot of time with them.

But is it possible that Catherine’s online friendships could be making her lonely? That’s what some experts believe. Connecting online is a great way to stay in touch, they say. However, some experts worry that many kids are so busy connecting online that they might be missing out on true friendships.

Could this be true? During your parents’ childhoods, connecting with friends usually meant spending time with them in the flesh. Kids played Scrabble around a table, not words with friends on their phones. When friends missed each other, they picked up the telephone. Friends might even write letters to each other.

Today, most communication takes place online. A typical teen sends 2,000 texts a month and spends more than 44 hours per week in front of a screen. Much of this time is spent on social media platform.

In fact, in many ways, online communication can make friendships stronger. “There’s definitely a positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other,” says Katie Davis, co-author of The App Generation.

Other experts, however, warn that too much online communication can get in the way of forming deep friendships. “If we are constantly checking in with our virtual world, we will have little time for our real-world friendships,” says Larry Rosen, a professor at California State University. Rosen also worries that today’s kids might mistake the “friends” on the social media for true friends in life. However, in tough times, you don’t need anyone to like your picture or share your blogs. You need someone who will keep your secrets and hold your hand. You would like to talk face to face.

1. What is the purpose of the first paragraph?

A．To tell about true friends.	B．To start a discussion.
C．To encourage online friendships.	D．To summarize(总结) the text.

2. What does the underlined part “in the flesh” mean in paragraph 3?

A．In any case.

B．In public.

C．In person.

D．In advance.

3. What is Katie’s attitude toward online communication?

A．Unconcerned.

B．Positive.

C．Worried.

D．Confused.

4. Which of the following is the Rosen’s view?

A．Teenagers need to focus on real-world friendships.	B．It’s easier to develop friendships in real life.
C．It’s wise to turn to friends online.	D．Social media help people stay closely connected.

2 . Blind people have long desired for brightness, but scientists don’t have the technology. To bring that one step closer to reality, Zhiyong Fan, a materials scientist of the Hong Kong University of Science and Technology, developed a new artificial eye recently. The device, which is about as sensitive to light and has sharper vision and a faster reaction time than a real eyeball, may outperform human eyes.

The human eye owes its wide field of view and clear eyesight to the retina (视网膜) — an area at the back of the eyeball covered in light-detecting cells. The design for a new artificial eye is based on the structure of the human eye and uses a friendly light-sensitive material. At the back of the eyeball, an artificial retina is lined with Nan scale light sensors (纳米级光感器). Those sensors measure light that passes through the lens (晶状体) at the front of the eye. Wires attached to the back of the retina send signals from those sensors to the processor, similar to the way nerve networks connect the eyeball to the brain.

“In the future, we can use this to replace damaged human eyes,” says the lead designer. In theory, this artificial eye could see more clearly than the human eye, because the artificial retina contains about 460 million light sensors per square centimeter while a real retina has about 10 million light-detecting cells per square centimeter. Besides, the artificial eyeball records changes in lighting faster than human eyes can — within about 30 to 40 milliseconds, rather than 40 to 150 milliseconds. Although its 100-degree field of view isn’t as broad as the150 degrees a human eye can take in, the device can see as well as the human eye in poor light.

Hongrui Jiang, an electrical engineer at the University of Wisconsin, though, thinks engineers need a much more practical and efficient way to produce vast series of tiny wires on the back of the artificial eyeball to give it superhuman sight, which is super hard to achieve.

1. Why does Zhiyong Fan develop the artificial eye?

A．To replace people’s real eyeballs.	B．To gain a sharper vision.
C．To help the blind regain their eyesight.	D．To help normal eyes perform better.

2. What is paragraph 2 mainly about?

A．The design of the artificial eye.	B．The structure of the human eye.
C．The advantages of the artificial eye.	D．The material used for the artificial eye.

3. What can we learn about the artificial eye and the human eye?

A．They have the same structure.

B．The artificial eye may see more clearly.

C．The human eye sees better in weak light.

D．The artificial eye takes in a broader view.

4. Which word best describes Hongrui Jiang’s attitude to the artificial eye?

A．Doubtful.

B．Favorable.

C．Unconcerned.

D．Satisfied.

4 . For as long as I can remember, I want to be a performer. But when it was time to go to college and decide what I wanted to be for the rest of my life, it didn’t occur to me to choose drama as my major. Making a living as a performer seems impractical to me. So instead of starting drama I started pre-law, and then went to law school like my two sisters did before me. They seemed happy enough, I thought; they worked about 80 hours a week, but they made good money and could afford expensive cars and fancy apartments in the city.

After law school I got a new job and worked as a lawyer for a big company. I had great benefits, including four weeks of vacation a year, but I never got to use any of my vacation time because there was always too much work to do. I worked from 7 a.m. to 9 p.m. six days a week, and when I was finished, all I could do was collapse into my bed until I woke up to do it all over again the next day.

After five years of this lifestyle, I thought I was going to go crazy. I was unhappy and exhausted, I never saw my friends or my family, and I realized I hadn’t been in a play or musical since I started law school. I thought that acting in a small community play might make me feel better, but rehearsals and performances all took place during my work hours. So I made a drastic decision and quit my job.

I got a small part in a local play and then the lead role. Now I make my living from acting, and once in a while, I do some legal consulting for a little extra money. I don’t get paid a lot for my acting jobs, but it’s enough. I had to give up my big apartment and expensive car, but I’m so much happier now. I see my friends and family, I have free time,and I get to do something I love every day.

1. The writer went to law school because 　　　.

A．his two sisters went to law school

B．he was interested in the practice of law

C．a lawyer’s job would bring him a decent and leisure life

D．acting jobs were not well-paid enough to earn a living

2. How did the writer feel about the work of a lawyer after five years practicing law?

A．Rewarding.

B．Exhausting.

C．Enjoyable.

D．Endless.

3. Why did the writer quit his job as a lawyer?

A．Work consumed almost all his time and energy.

B．He didn’t have great benefits.

C．He hated working and wanted a break.

D．Some rehearsals and performances took place during his work hours.

4. What is the purpose of the passage?

A．To inform us that the writer quit his job.

B．To show us how boring it is to be a lawyer.

C．To tell the writer’s story of making a living as an actor.

D．To share with us the change of the writer’s lifestyle and the reason.

5 . Finally came Wednesday! I walked onto campus feeling nervous even though I had walked on these same grounds for two years because my junior high school is next door. Everything looked and felt different now that I was in senior high.

I looked at my schedule. First period-German. Our German teacher was very friendly and I liked her from the beginning. What I didn’t like, though, was that I was surrounded by students from other grades, with only five familiar faces.

Then I had to walk all the way across campus and up three flights of stairs to get to my second period-biology. Our biology teacher is Ms Campeau, and I think that she will teach us a lot this year because she is very to the point. She also has her unique way of saying be quiet; she says“alligator”. She explained that she is the king, or should I say queen, of the class because alligators are the “king of the swamps (沼泽)”.

My third class was English. After surviving two periods without too much of a challenge, I began to feel good. However, the third period changed everything. Mr Valassidis, my English teacher, told us that we would have to write 40 essays (文章) and read AP-level books such as The 0dyssey this year. I love reading and writing, but 40ESSA YS?AP-level books? Now I was scared. He also talked about how important it was to be focused. Last year was not a very “focused” year for me. While doing homework, I was often talking on the phone, or busy with a conversation online. I planned on stepping it up this year because I wanted to stay an honours student.

1. What did the author mainly write about in this passage?

A．Her new teachers.

B．Her plan for the new year.

C．Her first day of senior high.

D．Her schedule for Wednesday.

2. What should students do when Ms Campeau says“alligator”?

A．Sit still.	B．Stop talking.
C．Look at the blackboard.	D．Listen carefully.

3. How did the author find her first two classes?

A．Unattractive.	B．Informative.
C．Very tiring.	D．Pretty easy.

4. Why did the author feel scared during the third period?

A．She couldn’t focus on her work.

B．She found the class demanding.

C．She didn’t like the teacher.

D．She did poorly at school.

6 . UNESCO World Heritage Sites were created to celebrate and safeguard the most unique places around the world. Below are my 4 favorite UNESCO World Heritage Sites.

Cinque Terre, Italy

With cars banned here, you’ll really get to feel the unique history and character of the Cinque Terre’s five centuries-old coastal villages. The breathtaking views of harbors far below the wild coastline along with the rich colors will definitely make it a memorable holiday.

Angkor Wat, Cambodia

Angkor Wat is the world’s largest religious (宗教的) monument and it contains impressive remains from the Khmer Empire (9th to 15th century). The site has dozens of iconic temples like Ta Prohm (a magnificent temple ruin hidden in the jungle). Hosting more than two million visitors annually, this artistic masterpiece is a must-see site.

Petra, Jordan

Petra’s rock-cut architecture has contributed to its nickname, the Rose City, based on the color of the stone it was carved from. The delicate constructions of temples and tombs along with the remains of churches and temples are only a couple of reasons why this world-famous site is a must-visit destination.

Yellowstone National Park, USA

Yellowstone’s vast wilderness includes mountain ranges, lakes and waterfalls. One of the main reasons for tourists to visit Yellowstone is to observe the amazing wildlife like grizzly bear, bison, bighorn sheep wander the plains and valleys.

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1. Where can tourists enjoy beautiful harbor views?

A．In Cinque Terre.	B．In Angkor Wat.
C．In Petra.	D．In Yellowstone National Park.

2. What do Angkor Wat and Petra have in common?

A．Colorful stones.	B．Religious relics.
C．Coastal villages.	D．Amazing wildlife.

3. Where is the text probably from?

A．A news report.	B．A wildlife brochure.
C．A travel blog.	D．An economic magazine.

7 . In habitats across the planet, animals periodically drop everything to walk, fly or swim to a new place. Some animals such as whales and geese learn migration paths by following their parents. Others, including small songbirds, gain the distance and direction of their migration within their genetic code. And some animals use a combination of genetics and culture to guide their migration.

Another group of migrators does not quite fit either model, and researchers have only recently started to figure out how they find their way. The Cory’s shearwater is an oceangoing seabird that migrates over the Atlantic every year. The young do not migrate with their parents, so culture cannot explain their journeys. And the exact paths vary wildly from individual to individual, making genetics equally unlikely.

Cory’s shearwaters are long-lived, rarely producing young successfully before age nine. This leaves an opening for learning and practice to develop their migration patterns. Researchers call this the “exploration-refinement”, and until now it has been hypothetical (假设的) because of difficulties in tracking migratory animals’ movements.

But a team of researchers has done that by attaching small geolocators to more than 150 of the birds aged four to nine. They found that younger birds traveled longer distances, for longer periods, and had more diverse paths than older birds. “We finally have evidence of the ‘exploration-refinement’ for migratory birds,” says Letizia Campioni, who led the study. Younger Cory’s shearwaters are able to fly just as fast as the adults——but they do not, suggesting that the young do more exploring, which gradually fades as they mature and settle into a preferred course.

“Although it may seem less efficient than other strategies, exploration refinement could be beneficial to birds and other organisms in a rapidly changing world due to unpredictable man-made changes,” says Barbara Frei. “It might be safer to repeat a behavior that was recently successful than to rely on patterns that were perfected long ago but might no longer be safe.”

1. What is the first paragraph mainly about?

A．It describes animals’ habitats.	B．It compares different species.
C．It talks about migration models.	D．It introduces a tracking technology.

2. What does the underlined word “this” in Paragraph 3 refer to?

A．The opening for learning and practice.

B．The unique living habit of Cory’s shearwaters.

C．The process scientists track Cory’s shearwaters’ movements.

D．The way Cory’s shearwaters form their migration patterns.

3. What does Letizia’s study find about the younger Cory’s shearwaters?

A．They travel as much as adult birds.	B．They lower the speed for exploration.
C．They move in a predictable manner.	D．They look for a course with their parents.

4. What can we conclude from the last paragraph?

A．Exploration refinement contributes to birds’ adaptability.

B．Man-made changes make migration easier.

C．Animals make a safer journey via a fixed track.

D．A combination of strategies assures migration success

8 . Endangered polar bears are breeding (繁殖) with grizzly bears (灰熊), creating “pizzly” bears, which is being driven by climate change, scientists say.

As the world warms and Arctic sea ice thins, starving polar bears are being forced ever further south, where they meet grizzlies, whose ranges are expanding northwards. And with that growing contact between the two come increasing hybrids (杂交种).

With characteristics that could give the hybrids an advantage in warming northern habitats, some scientists guess that they could be here to stay. “Usually, hybrids aren’t better suited to their environments than their parents, but these hybrids are able to search for a broader range of food sources,” Larisa DeSantis, an associate professor of biological sciences at Vanderbilt University, told Live Science.

The rise of “pizzly” bears appears with polar bears’ decline: their numbers are estimated to decrease by more than 30% in the next 30 years. This sudden fall is linked partly to “pizzly” bears taking up polar bears’ ranges, where they outcompete them, but also to polar bears’ highly specialized diets.

“Polar bears mainly consumed soft foods even during the Medieval Warm Period, a previous period of rapid warming,” DeSantis said, referring to fat meals such as seals. “Although all of these starving polar bears are trying to find alternative food sources, like seabird eggs, it could be a tipping point for their survival.” Actually, the calories they gain from these sources do not balance out those they burn from searching for them. This could result in a habitat ready for the hybrids to move in and take over, leading to a loss in biodiversity if polar bears are replaced.

“We’re having massive impacts with climate change on species,” DeSantis said. “The polar bear is telling us how bad things are. In some sense, “pizzly” bears could be a sad but necessary compromise given current warming trends.”

1. Why do polar bears move further south?

A．To create hybrids.	B．To expand territory.
C．To relieve hunger.	D．To contact grizzlies.

2. What makes “pizzly” bears adapt to natural surroundings better than their parents?

A．Broader habitats.	B．More food options.
C．Climate preference.	D．Improved breeding ability.

3. What does the underlined phrase “a tipping point” in paragraph 5 refer to?

A．A rare chance.	B．A critical stage.
C．A positive factor.	D．A constant change.

4. What’s the main idea of the text?

A．Polar bears are changing diets for climate change.

B．Polar bears have already adjusted to climate change.

C．“Pizzly” bears are on the rise because of global warming.

D．“Pizzly”bears have replaced polar bears for global warming.

9 . For people suffering from depression, there’s an all-natural treatment they should use — getting more exercise. It could help fight depression, even if people have a genetic risk, new research shows.

For the study, researchers collected information from nearly 8,000 people and found those with related genes were more likely to have depression over the next two years after examining them. But that was less likely for people who were more active at the study’s start, even if they had a family history of depression. Higher levels of physical activity helped protect even those with the highest genetic risk of depression.

Both high-intensity (高强度) exercise and low-intensity activities were associated with a reduced risk of depression. Adding four hours of exercise a week could lower the risk of a new episode (一段经历) of depression by 17%, according to the study. “Our findings strongly suggest that, when it comes to depression, being physically active has the potential to remove the added risk of future episodes in individuals who are genetically risky,” said lead author Karmel Choi. “On average, about 35 additional minutes of physical activity each day may help people to reduce their risk and protect against future depression episodes.”

Depression is a common mental illness globally, with more than 264 million people affected. “Depression is so ubiquitous, and that underlines the need for effective approaches that can impact as many people as possible,” Choi said. And mental health and primary care providers can use the findings to advise patients that there’s something meaningful they can do to lower their risk of depression.

1. How did the researchers reach their conclusion?

A．By analyzing a mass of data.

B．By conducting genetic research.

C．By comparing various levels of activity.

D．By tracking the subjects for many years.

2. What does the study show about depression?

A．Physical activity betters medical treatment.

B．Exercise is able to decrease and prevent it.

C．Different levels of exercise intensity matter the same.

D．Exercising 35 minutes daily is the most effective treatment.

3. What does the underlined word “ubiquitous” in paragraph 4 mean?

A．Harmful.	B．Complex.
C．Unusual.	D．Common.

4. What is the purpose of the text?

A．To discuss a disease.

B．To introduce a method.

C．To analyze a genetic risk.

D．To explain a phenomenon.

10 . Foreign visitors to the UK might be disappointed when they learn that not everyone there speaks like Harry Potter and his friends. Usually, there’s an assumption by many non-Brits that everyone in Britain speaks with what’s known as a Received Pronunciation (RP，标准发音) accent, also called “the Queen’s English”. However, while many people do talk this way, most Britons speak in their own regional accents (口音).

Scouse, Glaswegian and Black Country — from Liverpool, Glasgow and the West Midlands — are just three of the countless non-RP accents that British people speak with. There are even differences in accents between towns or cities just 30 kilometers apart. What is even more disappointing is that not speaking in a RP accent may mean a British person is judged and even treated differently in their everyday life.

In a 2015 study by The University of South Wales, videos of people reading a passage in three different UK accents were shown to a second group of people. The group then rated how intelligent they thought the readers sounded. The lowestrated accent was Brummie, native to people from Birmingham, a city whose accent is considered working class.

However, there is no need to be disappointed though you are not speaking in a RP accent. In fact, doing the opposite may even give you strength.

Kong Seongjae, 25, is an Internet celebrity from Seoul. After studying in the UK, he picked up several regional accents. He’s now famous for his online videos, where he shows off the various accents he’s learned. “British people usually get really excited when I use some of their local dialect words, and they become much friendlier. I think it makes a bit of bond between local people and foreigners to speak in their local accent,” he said.

So if you’re working on perfecting your British accent, try to speak like someone from Liverpool, Glasgow or Birmingham. You may not sound like Harry Potter, but you are likely to make more friends.

1. What can we infer from Paragraph 1?

A．Non-Brits usually hold that all Britons speak in a RP accent.

B．Only “the Queen’s English” is accepted in the UK.

C．Foreign visitors are disappointed at their on spoken English.

D．Any Received Pronunciation around the world is also called “the Queen’s English”.

2. What do people think of the Brummie accent?

A．Favored by foreign visitors to the UK.	B．Closest to the RP accent.
C．Smart and easy to understand.	D．Spoken by people of lower class.

3. What does the underlined phrase “doing the opposite” in Paragraph 4 refer to?

A．Speaking in a RP accent.	B．Speaking in regional accents.
C．Speaking the Brummie accent.	D．Speaking like Harry Potter.

4. What is the passage mainly about?

A．A study about the most intelligent accent in Britain.

B．A comparison between different British accents.

C．How much British people value the RP accent.

D．The influence of regional accents on people’s lives.