Unit4 名师点津（新人教版必修一） 2011届高考英语总复习名师全程导学案

解析：选A。主旨大意题。整篇文章都是对睡眠不足的原因和结果的调查，故选A。另外，通过排除法，也可得出答案为A。
7. Which of the following is Dr David’s opinion?
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.
解析：选D。细节理解题。从最后一段的“‘We’ve found that if you’re in sleep­deficit，performance suffers，’says Dr David”我们可知答案应为D。
8. People in the 18th and 19th centuries slept about 9. 5 hours a night because ________.
A. they were forced by their parents to do so
B. they knew what was best for their health
C. they had no electricity
D. they were not so dynamic and ambitious as modern people are
解析：选C。细节理解题。从第二段的“The best sleep habits once were forced on us，when we had nothing to do in the evening down on the farm，and it was dark. ”可知答案应为C。
9. The major cause of sleep­deficit of modern people is ________.
A. the endless TV programmes in the evenings and the Internet
B. the pressures of the day
C. the sufficient energy modern people usually have
D. loud noises in modern cities
解析：选B。细节理解题。从第三段可知答案应为B。
10. What does the word “subjects” in Paragraph 4 mean?
A. Persons or things being discussed or described.
B. Branches of knowledge studied in a school.
C. Persons or things being treated in a certain way or being experimented on.
D. Any member of a state apart from the supreme ruler.
解析：选C。词义猜测题。从最后一段，尤其是其中的“‘We’ve found that if you’re in sleep­deficit，performance suffers，’says Dr David”可得出答案应选C。
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