2019屆高考英語總復習名師全程導學案：Unit4 名師點津
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：選c。細節理解題。從第二段的“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. ”可知答案應為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：選b。細節理解題。從第三段可知答案應為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：選c。詞義猜測題。從最后一段，尤其是其中的“‘we’ve found that if you’re in sleepdeficit，performance suffers，’says dr david”可得出答案應選c。