The window needs ____ a.to clean b.cleaning 怎么选择?

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The window needs ____ a.to clean b.cleaning 怎么选择?
The window needs ____ a.to clean b.cleaning 怎么选择?

The window needs ____ a.to clean b.cleaning 怎么选择?
物作主语用 need doing sth ( = need to be done ),人作主事用need to do sth
window 是物,所以答案是B

选B

b

a

选B

a

a need to do sth是一个固定短语

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