题目内容

If one smokes too heavily, he is ________ the risk of having lung cancer.

A. at
B. in
C. on
D. with

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Not having breakfast will have a bad ________ on your health.

A. affect
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D. affective

Mr. Smith comes to our store every day. He is our ________ customer.

A. frequent
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A. buy
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D. bought

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A. in
B. on
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