you ___to the meeting tomorrow if you have something importa

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you ___to the meeting tomorrow if you have something important to do.
A.do not need come B.shall not need come C.need not come D.need not to come答案及解析

C
析：作为实义动词,need后面的宾语可以是名词、动名词、动词不定式或代词,这种情况下,need既可用于肯定句,也可用于否定句和疑问句,构成否定句和疑问句时要借助于助动词do或does.；后面加动词时为to do
作为情态动词时,类似于can的用法；只要need后面跟的是动词原形,它就是情态动词.这时,变否定,只需在其后加not；变为疑问句,只需把它移主语的前面
对于A,有do not时说明need是实义动词,后应该是to come,故A错
对于B,有shall时也说明need是实义动词,后应该是to come,故B错
对于D,need后面直接加not,说明need是情态动词,后面不用加to,故D错
答案为C

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