单项选择题

______ the idea of modem people is changing is obvious.

A．Whether
B．What
C．When
D．That
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单项选择题
______, I didn't go to the office.
A．To being sick
B．To be sick
C．Be sick
D．Being sick
单项选择题
We must work hard to ______ the plan.
A．realize
B．recognize
C．identify
D．aware
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