单项选择题

Almost overnight, Ames became a hero of environmentalists when his finding led to new and （）bans on certain chemicals.

A. regulations
B. authorities
C. orders
D. suggestions

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（）animals must be kept in cages in case they might hurt the tourists.

A. Land
B. Domestic
C. Vicious
D. Farm
单项选择题
You must always be ready to sacrifice ______ to duty.
A. inclination
B. tendency
C. interest
D. career
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