You know he is not going to let us leave early if we __________ get the work do
题型：不详难度：来源：
You know he is not going to let us leave early if we __________ get the work done. | A．can’t | B．may not | | C．shouldn’t | D．mustn’t |
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答案
| A。 |
解析
| can’t在此为基本用法，指能力，其意为“不能”。 |
举一反三
The weather turned out to be fine yesterday. I __________ the trouble to carry my umbrella with me. | A．should have taken | B．could have taken | | C．needn’t have taken | D．mustn’t have taken |
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The teacher __________ have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose. | A．should | B．can | | C．would | D．must |
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| In crowded places like airports and railway stations, you __________ take care of your luggage. |
The biggest problem for most plants, which ___ just get up and run away when threatened, is that animals like to eat them. | A．shan’t | B．can’t | | C．needn’t | D．mustn’t |
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— She looks very happy. She __________ have passed the exam.
— I guess so. It’s not difficult after all. | A．should | B．could | | C．must | D．might |
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