题库
题库
A．People who think they are sleeping enough are better off than those who don’t.
B．Some people can remain energetic with only 6.5 hours’ sleep a night.
C．If they get 8.5 hours’ sleep，people will be full of drive and ambition.
D．People’s mental power suffers if they are lacking in sleep.
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| 单选题 | The major cause of sleepdeficit of modern people is ________. | 查看答案 |
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| 单选题 | What does the word “subjects” in Paragraph 4 mean? | 查看答案 |
| 单选题 | What is the main topic of the passage? | 查看答案 |
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| 单选题 | Which of the following is Dr David’s opinion? | 查看答案 |
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| 单选题 | People in the 18th and 19th centuries slept about 9.5 hours a night because ________. | 查看答案 |
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