Yesterday Imet Sandy .We _ each other since _ middle school.A.have not seen ;finishedB.have not seen ;finishingC.had not seen ;finishedD.had not seen ;finishing

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Yesterday Imet Sandy .We _ each other since _ middle school.
A.have not seen ;finished
B.have not seen ;finishing
C.had not seen ;finished
D.had not seen ;finishing

选D
昨天见面,所以过去完成时
since doing sth.
finish 用ing 形式