You know that pearls grow inside oysters, but would you ever think to look for diamonds inside an ostrich? Well, a hunter once shot an ostrich and discovered, to his great surprise, that the big bird 题目和参考答案——青夏教育精英家教网—

题目内容

You know that pearls grow inside oysters(牡蛎), but would you ever think to look for diamonds inside an ostrich(鸵鸟)? Well, a hunter once shot an ostrich and discovered, to his great surprise, that the big bird had swallowed a bunch of diamonds. How could such a strange thing happen?

Like many other birds, the ostrich swallows small stones that stay inside its “gizzard”. The gizzard is a bird’s second stomach. It is where the food is ground up. The small stones help to grind up the food so it can be digested. The small stones do the chewing because birds don’t have teeth. In that case of the ostrich with the diamonds, the bird simply had expensive taste in rocks. It used the diamonds to digest its dinner.

Diamonds and stones aren’t all that an ostrich will swallow. If there are no stones around, it will eat just about anything. Sadly for ostriches in zoos, this can be a fatal habit. The tendency to swallow anything it sees has caused the death of many an ostrich. Cruel or careless people often throw things into the bird’s living space. They throw keys, coins, and even large objects such as horseshoes. The ostrich swallows them without hesitation. Coins can be the worst. Inside the ostrich they wear down to a razor-sharp edge. They will cut open the bird’s gizzard from the inside. When one young zoo ostrich died, 484 coins weighing more than eight pounds were found in its gizzard.

Which of the following best expresses the main idea of the passage?

A. Birds often eat strange and funny things.

B. Ostriches will swallow anything to help them digest food.

C. One ostrich died with 484 coins in its gizzard.

D. Ostriches are often hurt by cruel or careless people.

The ostrich is not smart enough to ______.

A. digest its own food B. eat only diamonds

C. avoid eating harmful objects D. escape from the zoo

The sentence “the small stones do the chewing” makes rocks seem as though they were ______.

A. important B. alive

C. dangerous D. uncomfortable

he word “fatal” in the third paragraph is another word for “______”.

A. foolish B. careless C. deadly D. cruel

【答案】

1.B

2.D

3.D

4.C

【解析】略

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Surveys of American teenagers find that about half of them do not get enough sleep on school nights. They get an average of 60 to 90 minutes less than experts say they need.

Experts say teens are biologically programmed to go to sleep later and wake up later than other age groups. Yet many schools start classes as early as seven in the morning.

As a result，many students go to class feeling like Danny，16 years old. He plays two sports，lacrosse and football. He is an active teen—except in the morning. DANNY：“Getting up in the morning is pretty terrible. I’m just very out of it and tired. And through first and second period I can hardly stay awake.”

Michael Breus，a clinical psychologist with a specialty in sleep disorders says：“These aren’t a bunch of lazy kids—although，you know，teenagers can of course be lazy. These are children whose biological rhythms，more times than not，are off.”Teens，he says，need to sleep eight to nine hours or even nine to ten hours a night. He says sleepy teens can experience a form of depression that could have big effects on their general well-being. It can affect not just their ability in the classroom but also on the sports field and on the road because any tired driver is dangerous，especially a teenager with a lack of experience.

So what can schools do about sleepy students？The psychologist says one thing they can do is start classes later in the morning.

Eric Peterson，head of St.George’s School in the northeastern state of Rhode Island，says，“In the end，schools ought to do what’s the right thing for their students，first and foremost.”And he wanted to see if a 30-minute delay would make a difference. It did.

According to the passage，which of the following is the chief cause of sleepy teenagers？

A. Persona haibits. B. Early school hours.

C. Sports activities. D. Too much home work.

According to Michael Breus， .

A. Teenagers are too lazy to get up early for school.

B. Teenagers should change their biological rhythms.

C. Lacking sleep can cause serious problems.

D. Sleepy teenagers shouldn’t drive to school.

What is Eric Peterson’s opinion on the issue？

A. Schools should try their best to help students.

B. Students should adjust to their school’s schedule.

C. Changing school schedule is their last choice.

D. Something has to change at the end of a school day.

What does the underlined word“It”in the last sentence might refer to？

A. St.George School. B. Rhode Island State.

C. Students in St.George School. D. 30-minute delay of school day.

What can you infer might follow the passage immediately？

A. Some positive changes in St.George’s school.

B. Some complaints from teachers and parents.

C. Some tips on how to help students foremost.

D. Some unexpected outcome of the delay.

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Once you arrive there, the welcome will be full, warm and real. Most visitors find themselves readily incited into many homes there. In some countries it is considered inhospitable to entertain at home, offering what is felt as “merely” home cooked food, not “doing something” for your guest. It is felt that restaurant entertaining shows more respect and welcome. Or for various other reasons, such as crowded space, language difficulties, or family custom, outsiders are not invited into homes.

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6. In the United States, you will find friendship ________ if circumstances change.

A. dies suddenly B. comes back

C. disappears gradually D. lasts forever

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A. ask B. require C. never allow D. don't expect

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A. less friendly B. less hospitable C. more friendly D. more popular

9. According to the passage, which of the following is NOT true in the United States?

A. Flowers are not customarily sent as a welcoming touch.

B. Flowers are expensive.

C. Flowers are sometimes signs of outward welcome.

D. Flowers must be sent to guests.

10. Which of the following is the BEST title for this passage?

A. Americans' Hospitality B. Americans' Friendship

C. Americans' Invitation D. Americans' Welcome

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6. The main reason for one is poor memory is that ________.

A. his father or mother may have a poor memory

B. he does not use his arms or legs for some time

C. his memory is not often used

D. he can't read or write

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A. you can't use them any more

B. they will become stronger

C. they become weak and won't become strong until you use them again

D. they will become neither stronger nor weaker

8. Which of the following is NOT true?

A. Your memory works in the same way as your arms or legs.

B. Your memory, like your arms or legs, becomes weak if you don't give it enough chance for practice.

C. Don't learn how to read and write if you want to have a better memory.

D. A good memory comes from more practice.

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A. they have save much trouble

B. they have saved much time to remember things

C. they have to use their memories all the time

D. they can't write everything in a little notebook

10. Which is the BEST title for this passage?

A. Don't Stop Using Your Arms Or Legs

B. How To Have a Good Memory

C. Strong Arms And Good Memories

D. Learn From the People

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