题目内容
10.-Must I finish my homework before I go home?-No,you ____.But you ____ finish it before two.( )
| A. | mustn't; must | B. | must; mustn't | ||
| C. | needn't; must | D. | needn't; mustn't |
分析 --我必须在回家前完成作业吗?
--不,你不需要,但你必须在两点之前完成.
解答 答案:C.考查情态动词.句意"--我必须在回家前完成作业吗?--不,你不需要,但你必须在两点之前完成.".Must必须,开头的一般疑问句,否定回答通常用No,…needn't,不,…不需要.因此A,B不正确.第二个空,but但是,表示转折,应该是"必须"两点前完成.用肯定形式.因此D不正确.答案是C.
点评 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语.要注意情态动词must的不同用法.结合语境选择正确答案.
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