题目内容：

Walking along the street,______.A.a car knocke
Walking along the street,______.A.a car knocked me down B.a car had me knocked down C.I had a car knock me down D.I was knocked down by a car 为什么选D

优质解答

首先这句话的主语肯定是I 因为是I walked along the street
然后后面肯定就是被动语态的一般过去时