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
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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
单项选择题
After having gone ______ far, George did not want to turn back.
A．enough
B．much
C．such
D．that
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