题目内容
20.He is ill today,so he ________ stay at home.( )| A. | must | B. | can | C. | may | D. | has to |
分析 今天他病了,所以他不得不呆在家里.
解答 答案:D.
A.must必须,表示主观原因B.can能C.may可以D.has to不得不,表示客观原因,根据He is ill today,可知他病了,所以客观上不得不呆在家里.故选D.
点评 本题考查了情态动词的用法.解答时注意句意以及所给选项的意思并作出正确选择.
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