We our hands while they were singing on the stage.A. clapB. have clappedC. were clappingD

发布时间：2020-08-21 07:12:15

We      our hands while they were singing on the stage.
A. clap
B. have clapped
C. were clapping
D. are clapping

网友回答

A. clap
B. have clapped
(答案→)C. were clapping
D. are clapping
解析：while引导的从句常用过去进行时。
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