单项选择题

One of the main characteristics of the good language learner is the high ____________ in study.

A．proficiency
B．efficiency
C．sufficiency
D．deficiency
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单项选择题
She was the first woman to ____________ office as a female Prime Minister.
A．catch
B．hold
C．seize
D．grasp
单项选择题
It can be implied according to the author that ____________.
A．credit cards are usually used irrationally and illegally
B．Americans enjoy buying what they cannot afford
C．products often don't perform as advertised
D．products are more expensive in the U.S. than anywhere else
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