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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单项选择题
______ 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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