单项选择题

The room was empty, but Tom felt that ______ was watching him.

A．anybody
B．nobody
C．somebody
D．everybody
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单项选择题
Only when you have obtained sufficient data ______ come to a sound conclusion.
A．can you
B．would you
C．you will
D．you can
单项选择题
After making a great effort, we finally ______ the plan.
A．carried on
B．carried out
C．carried off
D．carried over
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