单项选择题

If you want to know the times of buses, please ______ at the office.

A．inquire
B．inform
C．require
D．request
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单项选择题
Only when he has lost his way ______ that he wasn' t careful enough to make sure that he really did understand.
A．he realize
B．he can realize
C．he has realized
D．does he realize
单项选择题
The plan indicated that this objective was ______ in the following way.
A．attaining
B．to be attained
C．to attain
D．attained
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