---Look at that girl! Is that Susan?---No , it _______ be her. She has gone back
题型：不详难度：来源：
---Look at that girl! Is that Susan?
---No , it _______ be her. She has gone back to her hometown.| A．mustn’t | B．can’t | | C．must | D．might |
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答案
| B |
解析
试题分析：句意：看那个女孩！那是Susan吗？不，一定不是她。她回自己家乡了。表示否定的猜测要用can’t，故选B。 |
举一反三
---Lucy doesn’t mind lending you her dictionary.
---I think she doesn’t, but I ________do so. I’ve already borrowed one.| A．needn’t | B．mustn’t | | C．can’t | D．shouldn’t |
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—Look! The man at the gate _______be our headmaster. He is always standing there every morning.
—No, it_______ be him. He is holding a meeting in the office now.| A．must; can’t | B．must; mustn’t | | C．can’t; can’t | D．can’t; mustn’t |
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—Must I hand in my homework now， Mr.Smith?
—No，you ________.| A．can’t | B．shouldn’t | | C．wouldn’t | D．needn’t |
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— you sing the song Where Are You Going, Daddy?
— Yes. It’s easy.
A. Can B. May C. Must |
-Must I do my homework now? -No, you _ _. You may have a rest.| A．mustn"t | B．needn"t | | C．can"t | D．wouldn"t |
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