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We _______ work very quickly.
A.don’t needB.needn’t toC.need not toD.don’t need to
D

试题分析: 此题重点考查动词need的用法,它有两个词性,作为情态动词时经常用在否定句中,并且后跟动词原形;作为实义动词时后可跟名词,动词不定式,动词的现在分词(表示被动意义),其否定形式要借助助动词do的形式.根据语境可知此句的含义是我们没有必要干的那么快.根据语境和need的基本用法,可知D为正确答案.
点评:此题的关键要看怎样区分need的词性.A和D中的need是行为动词,但作为行为动词need的基本用法是need to do sth,A的答案是不对的;B和C都是情态动词,而need作为情态动词其后只能跟动词原形,故其也是错误的,故选D.因此区分need的词性是解题的关键,但要分析题干的基本结构.
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