题目内容
18.Mum,must I do my homework at once?---No,you ______.You may do it tomorrow.( )| A. | mustn't | B. | must | C. | needn't | D. | need |
分析 --妈妈,我必须立刻做作业吗?
--不,你不必.你可以明天做.
解答 答案:C.
根据No和You may do it tomorrow.可知下面为否定回答,must的含义是必须一定,其否定形式mustn't表示禁止的含义.在这里不是禁止的意思.must的否定回答一般可借助于needn'和don't have to来构成,表示不必.故选C.
点评 本题考查了情态动词的用法.注意must的用法以及它的肯否定形式.
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