They can see the words on the blackboard clearly,so they ()wear glasses.A.need to B.have toC.don't need D.don't have to

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They can see the words on the blackboard clearly,so they ()wear glasses.
A.need to
B.have to
C.don't need
D.don't have to

D 没有必要

D

D don't have to 不必。如选C.此处need 是实意动词,要用 don't need to请把四个选项都说一下 谢谢 不懂A. ‘B 两个选项的意思是需要,题目的大意是他们能看清黑板上的字,所以不需要戴眼镜。所以AB不合适。C.选项的need 既可以作情态动词,又可以做实意动词,如果Need 是情态动词的话,就不能用don't 来否定,如果是实意动词的话,就不能跟动词原形连用,C选项...

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D don't have to 不必。如选C.此处need 是实意动词,要用 don't need to

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