单项选择题

It is more ______ and healthlul to live in the countryside than in town.

A．financial
B．economic
C．economical
D．commercial
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单项选择题
Mr. and Mrs. Allen both have good jobs, so they must be ______.
A．well off
B．well on
C．well up
D．well over
单项选择题
You must try your best to ______ to the new environment.
A．adopt
B．adapt
C．adjust
D．affect
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