单项选择题

It is necessary that anyone ______ exercises every day if he wishes to keep healthy.

A．do
B．would do
C．did
D．will do
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单项选择题
______ to do now is just ______ I am eager to know at first. But how can I get to know it
A．What, what
B．which, what
C．That, That
D．What, which
单项选择题
He said he had no difficulty ______ the boat himself.
A．mending
B．to mend
C．in mending
D．A and C
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