单项选择题

You'd better _______ the water until it has been boiled.

A．not to drink
B．not drink
C．not drunk
D．not drinking
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单项选择题
It's necessary that the problem _______in some way or other.
A．is settled
B．was settled
C．be settled
D．has been settled
单项选择题
It will only _______me a minute to repair your shoes.
A．give
B．make
C．keep
D．take
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