单项选择题

The policy _____ made, the next problem was how to carry it out.

A．having been
B．being
C．had been
D．was
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单项选择题
The examination has been cancelled. You _____ all that revision, after all.
A．didn't need to have done
B．needn't have done
C．need to do
D．needn't do
单项选择题
The flower needs _____ . Would you like me to do it for you
A．watering
B．to water
C．water
D．to be watering
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