单项选择题

The manager is calling on a （）customer trying to talk him into signing the contract.

A. prosperous
B. preliminary
C. pessimistic
D. prospective

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单项选择题
Psychologists have done extensive studies on how well patients（）with doctors' orders.

A. comply
B. correspond
C. interact
D. interfere
单项选择题
You still need some substantial examples（）support of your argument, or few people will believe in your idea.

A. on
B. in
C. for
D. to
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