单项选择题

If you get into difficulties, don"t hesitate to （） help.

A．ask about
B．ask after
C．ask for
D．ask in
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单项选择题
If I have a good sleep I ll be （） to work out the problem.
A．possible
B．able
C．capable
D．reasonable
单项选择题
The football match was （） on account of rain.
A．called up
B．called on
C．called off
D．called for
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