To test his theory, the chemist ______ an experiment.

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问题 To test his theory, the chemist ______ an experiment.

选项 A、set up
B、set out
C、set forth
D、set in

答案A

解析 set up提出,设立;set out出发,启程;set forth阐明,动身,把(会议等)提前;set in开始,到来,涨潮。
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