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问几道英语时态题1.-I missed Iackie's party last night because my Aud

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问几道英语时态题
1.-I missed Iackie's party last night because my Audi broke down.
-Pity!You could have borrowed mine.I______ it.
A.didn't use B.hadn't use C.wasn't use
2.When she came out,Mary looked a little tired because she ____ the house.
A.was cleaning B.had cleaned C.had been cleaning
请给出选项并说明原因
1 C wasn't using你可以向我借.我当时并不在用
2 B 这里是已经完成,C的话是已经在做,不合适.