题目
On my way home,I saw a policeman ______ the old man cross the road.( )
A.
helps
B.
helping
C.
helped
D.
to help
知识点:时态辨析章节:句法 / 时态
On my way home,I saw a policeman ______ the old man cross the road.( )
helps
helping
helped
to help
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