单项选择题

We were asked to ______ our essay in three days.

A．hand over
B．hand out
C．hand in
D．hand down
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单项选择题
I doubt ______ she will change her mind.
A．whether
B．that
C．as
D．though
单项选择题
The question is of the ______ to all.
A．most important
B．least important
C．much important
D．least importance
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