单项选择题

Doctors often make higher ______ for their works than they should.

A．charges
B．bills
C．costs
D．payments
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单项选择题
The theme of the novel is that a person’s fate ______ that of. the whole country.
A．is closely linked up with
B．is closely dealt with
C．is closely taken as
D．is closely tied up with
单项选择题
We went on a(n) ______ to the mountain yesterday.
A．excursion
B．trip
C．tour
D．travel
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