单项选择题

Crisis would be the right term to describe the ______ in many animal species.

A．abolition
B．restriction
C．descent
D．decline
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Some parents are only concerned ______ their children's grades in studies.
A．of
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The followings are all correct responses to Do you mind my smoking here EXCEPT
A．No, do it please.
B．No, of course not.
C．I'm sorry.
D．Yes, go ahea
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