题目内容
20.---Look!Mr.Chen is playing volleyball so well on the playground.---It ______ be him.He's now having the math class in the classroom.( )
A. | can't | B. | mustn't | C. | may not | D. | needn't |
分析 --看!陈老师在操场上打排球打的如此好.
--不可能是他.现在他正在教室里上数学课.
解答 答案:A.can't不可能;mustn't不可以,禁止;may not可能不;needn't不必.根据He's now having the math class in the classroom,可知陈老师正在教室里上数学课,所以在操场上打排球的那个人不可能是他.may not----也许不(推测时不太有把握)can't------不可能(推测时很有把握).故选A.
点评 本题考查了情态动词的用法.解答时注意理解句意以及所给选项的意思.
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