题库
题库
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
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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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