-Havethestudentsstartedtoworkontheirexperiment?-Yes,it________.A.hasdone

发布时间:2020-08-04 23:17:41

-Have the students started to work on their experiment?-Yes, it ________.A.has doneB.is going to be doneC.is being doneD.is to be done

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C解析由Yes可知,实验已经开始,也就是说实验正在被做,因此用现在进行时的被动语态。
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