— Must we wear our school uniform this afternoon?— No, you. All of us will go on
题型：不详难度：来源：
— Must we wear our school uniform this afternoon?
— No, you. All of us will go on an outing.| A．mustn"t | B．can"t | C．needn"t | D．couldn"t |
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答案
| C |
解析
试题分析：mustn"t禁止；can"t不能，不可能；needn"t不必；couldn"t不能。句意：我们必须今天下午穿上我们的校服吗？——不，你们不必。我们都要去郊游。must的含义是必须一定，其否定形式mustn’t表示禁止的含义。故must的否定回答一般借助于needn’和don’t have to来构成，结合语境可知选C.
点评：must的否定形式是常考内容之一，结构比较固定，熟记即可。 |
举一反三
—Mum, I can’t find my new pen.
—Don’t worry. It ____________in one of your pockets.| A．may | B．maybe | C．may be | D．might |
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We can eat in the dining hall. But we _______ eat in the classroom.| A．don’t | B．didn’t | C．can’t | D．aren’t |
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— Who’s that man in our classroom? It ________ be Mr. Brown. He is much taller.
— You mean the man in white? He is an exchange student from England.| A．can | B．may | C．can’t | D．mustn’t |
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--The man in a black suit _______ be our youth worker.
--- I’m sure it _______ be him. I saw him in the laboratory building some minutes ago.| A．must; can’t | B．can; mustn’t | C．can; could | D．must; won’t |
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– Must I clean up the classroom right now, Miss Green?
-- No, you ______.| A．mustn’t | B．can’t | C．needn’t | D．may not |
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