－Is Mr. Li in his office ?－No, he __________ in the office. He’s ill in hospita
题型：不详难度：来源：
－Is Mr. Li in his office ?
－No, he __________ in the office. He’s ill in hospital.| A．must be | B．can’t be | | C．should be | D．needn’t be |
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答案
| B |
解析
试题分析：根据He’s ill in hospital “他生病住院了。”可知，本句应该是“他不可能在办公室。”故排除AC；“不可能”是can’t。而needn’t表示“不必”，与题意不符。所以本题选B。
点评：本题实际是考查情态动词表示推测的情况，这很容易与以前学过的情态动词的用法相混淆。情态动词表示推测的情况，表示一般性推测用might、could表示“可能”；表示肯定推测用must表示“一定”；否定推测用can’t表示“不可能”。 |
举一反三
Is that your best friend Kitty?
— No, it _________ be her. She flew to Singapore yesterday.| A．must | B．can | C．Mustn’t | D．Can’t |
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| ---Is John coming by train? ---He should, but he ________ not. He likes driving his car. |
---.Look! It _____be your uncle .
----It_____ be him . He has gone to Xi’an.| A．can, mustn’t | B．can , can’t | C．must, can’t | D．must, may |
|
—Must I finish the book today?
—Yes, you ________, but you ________ finish it now. Have a rest.| A．do; don’t have to | B．do; mustn’t | | C．must; don’t have to | D．must; mustn’t |
|
— I smoke here, Sir?
— No, you . Look! It’s non-smoking area.
A. Can; needn’t B. May; mustn’t C. Could; won’t |
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