问题描述：
_____,Tom got to school on time
A.Helped by a driver B.Tom was helped by a driver
c.Helping by a driver D.To be helped by a driver
我选的是A ,对么?这题考哪一知识点啊?
A.Helped by a driver B.Tom was helped by a driver
c.Helping by a driver D.To be helped by a driver
我选的是A ,对么?这题考哪一知识点啊?
问题解答：
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