问题描述:
-----------,a car knocked her down.
A.Walking home
B.As she was walking home
C.While walking
D.When she had walked home
这题为什么选B了,而不是abc中的一个,
A.Walking home
B.As she was walking home
C.While walking
D.When she had walked home
这题为什么选B了,而不是abc中的一个,
问题解答:
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