Asurvey_________lastweek______the

发布时间:2020-07-27 10:48:51

A survey _________ last week ______ the students at No.2 Middle school.A.did; forB.was done; onC.has done; forD.has been done; on

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B解析A survey做主语,应该用被动语态,而且时间为过去时,故选B.
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