单项选择题
At the same time, medical and social science research began to indicate that retirement itself had
detrimental
effects.
A. damaging
B. magnificent
C. useful
D. relevant
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单项选择题
Parliament defeated a bill authorizing a regular census because it______
A. might give valuable news to England
B. would give England’s enemies cause for rebellion
C. would be too expensive
D. might disclose information to England’s enemies
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单项选择题
Jumbo jets are mentioned as examples of______
A. efficient transportation with low levels of noise
B. vehicles that cause serious air pollution
C. scientific advances that do more harm than good
D. quieter and older vehicle
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