My new novel has disappeared.Who _______ have taken it?A．shouldB．mustC．couldD．w
题型：不详难度：来源：
My new novel has disappeared.Who _______ have taken it?| A．should | B．must | | C．could | D．would |
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答案
| C |
解析
| “我新买的小说不见了。是谁拿走了呢？” 表示对过去事情的推测，must表示肯定，在否定和疑问句中用can/could。 |
举一反三
Since you have made such good preparations,there _______ be any problem about passing the coming exam.| A．mustn’t | B．shan’t | | C．shouldn’t | D．needn’t |
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If I would have had more time, I would have done it far better.
A B C D |
It is required that no smoking ______ in the school.| A．was allowed | B．be allowed | | C．would be allowed | D．had been allowed |
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How happy we _______, if you had come with us to the party. | A．could be | B．may have been | | C．would have been | D．were |
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--Listen! Someone is knocking at the door.
-- ______ be Mary. She has just been to Beijing| A．She mustn’t | B．It can’t | C．It must | D．She may |
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