选择什么?All the students______sports at this time yesterday.
Allthestudents______sportsatthistimeyesterday.A.didB.aredoingC.weredoingD.havedone...
All the students______sports at this time yesterday.
A.did B.are doing C.were doing D.have done 展开
A.did B.are doing C.were doing D.have done 展开
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