At five months old, the joey peers out of his pouch. He eats a special soft food from his mother called pap. When the joey eats pap, he gets bacteria（细菌）from his mother?s stomach in his tummy too. He will need the bacteria to eat eucalyptus leaves, like grownup koalas do.
In another month, the joey leaves the pouch for the first time. He clings（贴着）to his mother?s belly while she climbs in the treetops. By the time he is eight months old, the joey no longer fits in his mother?s pouch. But he still drinks her milk.
Now, for a few hours each night, the joey climbs on his mother?s back for a ride. While riding piggyback, he reaches for eucalyptus leaves. Just like mom, he nips (咬) off leaves and chews them. The leaves have plenty of water in them, so koalas rarely go to the ground for a drink. When the joey is about one year old, his piggyback days are over. Now he climbs to the treetops by himself. On each of his front paws, he has two thumbs opposite his three fingers. He can grip branches and grab leaves.
The young koala spends more and more time away from his mother. He no longer drinks her milk. He dozes (打瞌睡，打盹) alone on tree branches. Soon he will move to another tree and live on his own.
49．When a joey is eight months old, it can _________.
A. eats a food called pap B. rides on his mother?s back C. sleeps on tree branches D. clings to his mother?s belly 50. A joey stops drinking its mother?s milk when it is about_______.
A. one year old B. six months old C. eight months old D. five months old 51. Paragraph 2 is mainly about_________.
A. the name of a baby koala B. what a newborn koala is like C. the size of a baby koala D. what kind of fur a newborn koala has 52. The author most likely wrote this passage to________.
A. introduce readers about baby koalas B. tell a funny story about a baby koala C. encourage people to protect baby koalas D. compare a baby koala to other baby animals
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D
Biting could be worrying
IT makes our fingers look ugly. It?s dirty. It could hurt a lot. But many people just can?t stop doing it: biting their nails.
Up to 45 percent of teenagers in the UK bite their nails, the BBC reported. There are also many famous nail biters, including ex-British Prime Minister Gordon Brown and American singer Britney Spears.
There?s nothing wrong with biting nails to keep them tidy. But it could get out of control.
Some people bite a nail not because it?s too long, but because they are driving, reading, feeling stressed out, or just have nothing else to do.
The same could happen to skin picking and hair pulling. A normal behavior could become “pathological”(病态的), as experts say.
In 2013, the American Psychiatric Association labeled (把??列为) nail biting as an obsessive-compulsive disorder (OCD). People with this disorder may wash their hands too many times or have to line up their shoes in a certain way.
These behaviors have a lot in common. OCD is doing something normal and healthy too much, NPR reported.
But nail biting is different from other OCD behaviors in at least one way.
“In OCD, the behavior is really unwanted,” Carol Mathews, a psychiatrist（精神病医生）at the University of California, San Francisco, told NPR. People with OCD don?t want to wash their hands over and over again. There is no fun in it. They just fear that if they don?t do something, something else that?s very bad will happen to them.
But nail biters enjoy it.
“It?s rewarding. When you get the right nail, it feels good,” said Mathews.
Therefore some people argue that most nail biters are not having a problem as serious as a mental (心理的) disorder.
But anyway, it?s still a bad habit. So what can we do to stop it?
Since most people bite nails as a way of relieving (缓解) stress, finding another way to relieve that stress could be useful, suggested Rochelle Torgerson, a doctor at the Mayo Clinic in the US. Try playing with your pen instead.
Besides, nail biters feel the urge (刺激，冲动) to bite if they find a small imperfect part of the nail, said Mathews. So always keep your nails in good shape.
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53. What does the phrase obsessive-compulsive disorder in Paragraph 6 mean? A. An activity that people enjoy doing it.
B. A kind of behavior that people is really wanted.
C. A way of doing something that people does it normal and healthy.
D. A mental disorder that people are unable to control the thoughts or the activities.
54. How is nail biting different from other OCD behaviors?
A. People do it over and over again.
B. People do it happily and willingly.
C. It does no harm to people?s health. D. It is a physical and mental problem.
55. What do doctors suggest people do to stop nail biting?
A. Pick skin or pull hair instead.
B. Force them to control the urge to bite. C. Keep them busy and forget about nails.
D. Find some other ways to release their stress.
七、阅读短文，根据短文内容，从短文后的五个选项中选出能填入空白处的最佳
选项。每个选项只能用一次。（共10分，每小题2分）
Chinese Paper Cutting
As traditional Chinese art, paper cutting has a long history. The first and earliest paper cutting was found in China 1,500 years ago. 56 . Luckily, Voyo Woo, a Chinese immigrant（移民）in America, is trying to bring this art back to life.
One Saturday in 2014, Ms. Woo held a paper cutting show at a shopping center near Washington. 57 . She hoped more people would enjoy the art of paper cutting.
Ms Woo began to study the art of paper cutting as a 14-year-old girl in her hometown in China. She said all the students at school had to learn paper cutting. But she had a deep love for it. 58 . Later, she won the second prize in a national painting and art competition. Ms. Woo went to America after she finished college in 2008. Soon after that, she took part in an activity to promote（宣传）Chinese paper cutting. 59 .“It is important to promote this art to Americans or anyone who is interested in it. Maybe it will make this art more popular.”Woo said.
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From the art of paper cutting, people can know about Chinese cultural values, history and stories of people?s life. Ms Woo uses the art as a tool to show Chinese culture to people who know little about it. 60 , but also for people all over the world.
A. Just because Chinese art is not only for Chinese B. She got much fun and peace from the show C. But this traditional art is at risk of disappearing now D. So her teacher spent more time teaching her after class E. And then she was invited to show the art in many important activities
八、阅读短文，根据短文内容回答问题。（共10分，每小题2分）
There are many benefits of reading books. Unfortunately, in this day and age, not a lot of people take the time to read them anymore. But that doesn't change the fact that you're missing out on a lot of wonderful benefits! Read on to learn the various benefits of reading books!
? It Feeds Your Mind.
Obviously, reading books provides you with new knowledge. Whenever you read something, you learn new information that you otherwise would not have known.
It can be a fact about history or a theory you did not know existed. If you want to learn new words in particular, reading books is a great way to enrich your vocabulary. ? It Keeps Your Brain In Shape.
Reading also keeps your mind in good condition. Similar to solving puzzles, reading books allows your mind to practice its processing skills.
Going without books for too long will turn your mind to mush (玉米面粥). I'm not kidding! Why do you think they call television the boob tube? ? It Develops Your Critical Thinking Skills.
One of the primary benefits of reading books is its ability to develop your critical thinking skills. Reading mystery novels, for example, sharpens (使敏锐)your mind. Whenever you are faced with a similar problem in real life, your mind is now able to put its mystery-solving prowess to a test. ? It Makes You More Articulate.
There's nothing quite like reading books to help you become a better conversationalist. Seeing how words are used (and how sentences are structured) with your own eyes helps you commit the information to memory better than by listening to
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