单项选择题

All mammals have hair, but not always evident（）.

A．but it is not
B．but it is
C．but they are not
D．but they are

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单项选择题
We don''t plan to go to the concert, and so they don''t（）.

A．so do they
B．they don't too
C．neither don't they
D．they don't either
单项选择题
Motivation is the driving force within individuals that impels them to action（）.

A．impedes
B．interferes
C．holds
D．pushes
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