单项选择题

Without the radar receiver, the large antenna(无线) ______ of no use.

A．would be
B．will be
C．be
D．was
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If you can't turn the key, try ______ some oil in the lock.
A．to put
B．put
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I'm disappointed with the new officers elected in our club, but there is no point ______ about it.
A．to worry
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