单项选择题

Next to natural resources comes the ability to ______ them to use.

A．take
B．set
C．get
D．turn
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单项选择题
The scientist ______ most of his experiments if he had not run short of his fund.
A．would finish
B．had finished
C．would have finished
D．ought to have finished
单项选择题
It is too soon to say how much. I have ______ from these courses.
A．benefited
B．obtained
C．improved
D．recovered
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