He often helps his mother ____ housework over the weekend.A.do B.does C.did D.doing

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He often helps his mother ____ housework over the weekend.A.do B.does C.did D.doing
He often helps his mother ____ housework over the weekend.
A.do B.does C.did D.doing

He often helps his mother ____ housework over the weekend.A.do B.does C.did D.doing
A
help somebody (to) do something固定搭配,to不用写出来

A ( help sb do sth.= help sb to do sth帮助某人做谋事)