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D
What happens if you don't get enough sleep? Randy Gardner,a high school student in the US,wanted to find out. He did an experiment on the effect of sleeplessness for a science project and stayed awake for about 264 hours.
After 24 hours without sleep,Gardner started having trouble reading and watching television. The words and pictures were blurry. By the third day,he was having trouble doing things with his hands. By the fourth day,Gardner was hallucinating(产生幻觉). Over the next few days,Gardner's speech became hard to understand. By the eleventh day,Gardner couldn't pass a counting test. He simply stopped counting in the middle and couldn't remember what he was doing.
When Gardner finally went to bed,he slept for 14 hours and 45 minutes. The second night he slept for twelve hours,the third night he slept for ten and one - half hours,and by the fourth night,he had returned to his usual sleeping time. Even though Gardner became well again quickly,scientists believe going without sleep can be dangerous and say people shouldn't repeat Randy's experiment.
Has anyone stayed awake longer than Gardner? Yes! Maureen Weston from the UK holds the record for staying awake the longest in 1977. She went 18 days and 17 hours without sleep!
During your lifetime,you will likely spend 1/3 or more of your life sleeping. But why? Surprisingly,scientists don't know for sure. Scientists used to think we “turned our brains(大脑)off” when we went to sleep. But now,however,they know our brains are very active when we sleep. Some scientists think we sleep to refresh brain cells. Other scientists think sleep helps the body to grow and feel relaxed. Whatever the reason,we know it's important to get enough sleep.
(
A. 24 hours. B. 14 hours.
C. About 11 days. D. Around 18 days.
(
A. Unclear. B. Colorless. C. Funny. D. Exciting.
(
A. Gardner stayed awake the longest in the world.
B. Scientists can tell why sleep takes a long time in our life.
C. Gardner slept as usual on the first night after the experiment.
D. Scientists have found our brains are active while we are sleeping.
(
A. To show a special experiment.
B. To introduce an American student.
C. To tell people the truth of sleep.
D. To advise people to sleep enough.

What happens if you don't get enough sleep? Randy Gardner,a high school student in the US,wanted to find out. He did an experiment on the effect of sleeplessness for a science project and stayed awake for about 264 hours.
After 24 hours without sleep,Gardner started having trouble reading and watching television. The words and pictures were blurry. By the third day,he was having trouble doing things with his hands. By the fourth day,Gardner was hallucinating(产生幻觉). Over the next few days,Gardner's speech became hard to understand. By the eleventh day,Gardner couldn't pass a counting test. He simply stopped counting in the middle and couldn't remember what he was doing.
When Gardner finally went to bed,he slept for 14 hours and 45 minutes. The second night he slept for twelve hours,the third night he slept for ten and one - half hours,and by the fourth night,he had returned to his usual sleeping time. Even though Gardner became well again quickly,scientists believe going without sleep can be dangerous and say people shouldn't repeat Randy's experiment.
Has anyone stayed awake longer than Gardner? Yes! Maureen Weston from the UK holds the record for staying awake the longest in 1977. She went 18 days and 17 hours without sleep!
During your lifetime,you will likely spend 1/3 or more of your life sleeping. But why? Surprisingly,scientists don't know for sure. Scientists used to think we “turned our brains(大脑)off” when we went to sleep. But now,however,they know our brains are very active when we sleep. Some scientists think we sleep to refresh brain cells. Other scientists think sleep helps the body to grow and feel relaxed. Whatever the reason,we know it's important to get enough sleep.
(
C
)27. How long did Gardner stay awake in the experiment?A. 24 hours. B. 14 hours.
C. About 11 days. D. Around 18 days.
(
A
)28. What does the underlined word “blurry” probably mean in Paragraph 2?A. Unclear. B. Colorless. C. Funny. D. Exciting.
(
D
)29. What can we learn from the text?A. Gardner stayed awake the longest in the world.
B. Scientists can tell why sleep takes a long time in our life.
C. Gardner slept as usual on the first night after the experiment.
D. Scientists have found our brains are active while we are sleeping.
(
D
)30. What is the main purpose of the text?A. To show a special experiment.
B. To introduce an American student.
C. To tell people the truth of sleep.
D. To advise people to sleep enough.
答案:
27. C 28. A 29. D 30. D
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