----- I want to know if I _________ smoke here. ----- No, you ___________. Can’t
题型：不详难度：来源：
----- I want to know if I _________ smoke here.
----- No, you ___________. Can’t you see the sign “NO SMOKING” there?| A．shall; won’t | B．may; mustn’t | C．can; needn’t | D．must; can’t |
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答案
| B |
解析
| 在if 引导的宾语从句中，从句时态要根据自己本身内容时态决定，mustn’t表示禁止的意思，故选B |
举一反三
---Look at the boy running on the playground. Is it David?
---It ______ be him. I saw him go to the teachers’ office just now.| A．mustn’t | B．can’t | C．couldn’t | D．must |
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----Listen! Is Kitty in the next room?
---- No, it ______ be Kitty. She has gone to Beijing.| A．may not | B．can’t | C．mustn’t | D．needn’t |
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That man ________ be Mary’s father, as he is much taller.| A． can | B．must | C． can’t | D． mustn’t |
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He ________be at home because the light in his room is on.| A．must | B．can’t | C．can | D．mustn’t |
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A: Listen! Is it Linda singing in the next room?
B: No, it __________ be her. She is still in Shanghai.| A．can’t | B．couldn’t | C．may not | D．might not |
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