Is Tom helping his father( )the house?A cleaningB cleanC cleaned

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Is Tom helping his father( )the house?A cleaningB cleanC cleaned

Is Tom helping his father( )the house?A cleaningB cleanC cleaned
Is Tom helping his father( )the house?
A cleaning
B clean
C cleaned

Is Tom helping his father( )the house?A cleaningB cleanC cleaned
B
help sb do sth

help sb to do sth 都可,
后者没有,只有前者,选B,
如果两者都有,则倾向于选前者
这里的Is 现在进行时是用在helping上的,
后面的clean只要考虑help的用法.

A cleaning

a