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it's cold outside.you need____warm clothes.A put on B puttin

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it's cold outside.you need____warm clothes.A put on B putting on C to put on D not put on
为什么不选A ,当need是情态动词加v
肯定句要用need to doC to put on 附:need 搭配need to do sth实义动词 need do sth. 没有这种用法,有need doing,表被动“need”作为实义动词时,通常用法是: 人+need +to do 物+need +doing 物+need +to be done