Yesterday Imet Sandy .We _ each other since _ middle school.

问题描述:

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