I on a sofa because my grandparents have come for the weekend.A．sleptB．was sleepingC．have sleptD．am sleeping 题目和参考答案——青夏教育精英家教网——

题目内容

I ______ on a sofa because my grandparents have come for the weekend.

A．slept

B．was sleeping

C．have slept

D．am sleeping

D

解析

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