题目内容
18.--Have you seen Jack?His mother is looking for him all the afternoon.--No,I haven't.I am sure her mother _____ be very worried.( )
| A. | must | B. | may | C. | need | D. | should |
分析 --你看到Jack了吗?他妈妈一下午都在找他.
--不,我没有.我确信他的母亲一定非常担心.
解答 答案:A.must一定,必须,表示推测时可能性非常大;may可能,表示推测时可能性不大;need需要;should应该.根据His mother is looking for him all the afternoon.可知他妈妈找了一下午没有找到,所以一定非常担心,must一定,必须,表示推测时可能性非常大.故选A.
点评 本题考查了情态动词的用法.解答时注意:must一定,必须,表示推测时可能性非常大;may可能,表示推测时可能性不大.
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