单项选择题

To test his theory, the chemist () an experiment.

A. set up
B. set out
C. set forth
D. set in

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单项选择题
Cox Radio, one of the nation’s largest radio chains, plans to ______ its ties with independent record promoters to distance itself from a payola-like practice that runs rampant in the music business.
A. consolidate
B. tout

C. sever

D. splash
单项选择题
Ms. Rice, with customary class, simply expressed hope that this episode wouldn’t ______ the charity in spite of the previous scandals.
A. taint

B. enhance

C. sprain

D. sponsor
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