单项选择题

Mr. Morton gradually ______ a knowledge of the subject.

A．attained
B．required
C．acquired
D．enquired
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单项选择题
Advertising costs are no longer in reasonable ______ to total cost of the product.
A．relationship
B．match
C．measure
D．proportion
单项选择题
If a person talks about his weaknesses, the listener is expected to say something in the way of ______.
A．assurance
B．encouragement
C．persuasion
D．confirmation
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