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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单项选择题
I went there in 1988, and it was the only occasion when I ______ the journey in.exactly two days.
A．must make
B．could make
C．must have made
D．was able to make
单项选择题
The ultimate authority for Canada's fiscal policy is ______ the hands of the federal, and the provincial governments.
A．on
B．by
C．for
D．in
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