---Must we leave the classroom now?---No, you _____. You _____ leave after the b
题型：不详难度：来源：
---Must we leave the classroom now?
---No, you _____. You _____ leave after the bell rings.| A．mustn"t; are allowed to | B．don"t have to; might | | C．needn"t; can | D．can"t; are supposed to |
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答案
| C |
解析
试题分析：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，句意:我们现在必须离开教室吗？——不，你们不必。你们可以在铃响之后离开教室。在表示可能时，might表示推测语气，can表示客观的能力，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
---Must Jack come to sign his name on the paper?
---Yes, he_____ . |
—Must I park my car behind the cinema?
—No,you ．You park it here| A．mustn’t, may | B．may not, must | C．don’t have to, may | D．shouldn’t, must |
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—Could I keep this book for another week?
—Of course you .| A．can | B．must | C．should | D．will |
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____ he _____ get up early?| A．Did used | B．Is use | C．Does use | D．Did use |
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My grandparents never remember my telephone number, and they always _______ look it up.| A．must | B．can | C．should | D．have to |
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