单项选择题

Passage Two
Questions 30 to 32 are based on the passage you have just heard.

A. Cold. B. Viruses. C. Infection. D. Wet.
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单项选择题
A. To make them longer. B. To avoid accidents. C. To save materials. D. To improve techniques.
A. To make them longer. B. To avoid accidents.
C. To save materials. D. To improve techniques.
单项选择题
A. The drug made them lose the ability to work. B. The drug made it easier for people to think rationally. C. The drug made people worry more about the future. D. The drug enabled people to forget all their problems.
A. The drug made them lose the ability to work.
B. The drug made it easier for people to think rationally.
C. The drug made people worry more about the future.
D. The drug enabled people to forget all their problems.
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