these chairs and desks are broken.they need___ a.to repair b.repairing c.repair d.repaired

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thesechairsanddesksarebroken.theyneed___a.torepairb.repairingc.repaird.repairedthesechairsanddesksar

these chairs and desks are broken.they need___ a.to repair b.repairing c.repair d.repaired
these chairs and desks are broken.they need___ a.to repair b.repairing c.repair d.repaired

these chairs and desks are broken.they need___ a.to repair b.repairing c.repair d.repaired
先弄清need 的用法‘ 物作主语时后接doing / to be done ,人作主语时后接to do .这里是物作主语,故用ING 形式,即B对

B.repairing
need后接动名词时表示被动含义,相当于动词不定式的被动形式.
They need repairing=They need to be repaired.

B need to be done = need doing sth

need dong sth.是主动表被动啊, for example,My hair need cutting