单项选择题

According to the passage, the unfavorable conclusions about drugs were kept a secret from （）

A. the general public
B. the drug companies
C. the researchers
D. the authorities

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单项选择题

Sartre held that, as a moral being, one should NOT （）

A. do simply as others expect
B. conceal one’s shameful past
C. always defy others’ opinions
D. retreat from various pressures

单项选择题

The author believes that the real intent of those supporting the regulation is to （）

A. help cure insect-born tropical diseases
B. promote environmental protection
C. stop the chemical companies’ business
D. protect African children against insects