Jack often helps his father ____ in the garden.A.to work B.working C.works D.worked
问题描述：
Jack often helps his father ____ in the garden.A.to work B.working C.works D.worked
答
正确答案为：
A to work
help sb ( to ) do 帮助某人做某事,to 可以省略 也可以保留.
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