—Everyone in my class passed the exam.—Oh, really? It ________ difficult.A．can’t
题型：不详难度：来源：
—Oh, really? It ________ difficult.| A．can’t have been | B．needn’t have been | | C．must be | D．mightn’t be |
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答案
A |
解析
试题分析：句意：——在我班学生考试都及格了。——哦,真的吗?它一定不难。can’t have been 过去不可能，有把握的推测；needn’t have been 过去本没有必要； must be现在或将来一定，有把握的推测；mightn’t be可能不，没有把握的推测；根据句意每个人考试都及格了，可知考试不难，这是有把握的推测。故选A。 |
举一反三
Days later, my brother called to say he was all right, but ________ say where he was. | A．mustn’t | B．shouldn’t | C．wouldn’t | D．mightn’t |
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Johnny’s uncle promises that the boy get a nice present on Christmas Eve.| A．should | B．must | C．can | D．shall |
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— Isn’t that Ann’s husband over there?
— No, it ________ be him — I’m sure he doesn’t wear glasses.| A．must not | B．can’t | C．won’t | D．may not |
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—The speaker is a tall man with glasses.
—Then it be Mr. Smith, who is short and thin.| A．can’t | B．wouldn’t | C．won’t | D．mustn’t |
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--- I don’t mind telling you what I know.
--- You_________. I’m not asking you for it. | A．mustn’t | B．may not | C．can’t | D．needn’t |
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