----- Mary looks very upset. She _______ failed to pass the exam. ----- I guess
题型：不详难度：来源：
----- Mary looks very upset. She _______ failed to pass the exam.
----- I guess so. It"s very difficult after all.| A． must have | B．could have | C．should have | D．might have |
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答案
| Ａ |
解析
| 考察情态动词用法。Must have done一定做了某事；could have done本可以做某事；should have done sth本应该做某事；might have done也许做某事；结合句意可知A正确。句意：—玛丽看起来很难过。她一定考试没有及格。 |
举一反三
—Did you visit the museum last week?
—No, we _____, but we spent too much time shopping.| A．could have | B．could | C．must have | D．must |
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----Will Barbara come to our party?
----I am not sure, because he ____ go to the concert with his friend.| A．can | B．must | C．should | D．might |
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Since you have practiced so much in driving，there _____be any difficulty in passing the road rest.| A．mustn’t | B．shan’t | C．shouldn’t | D．needn’t |
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Every time they met, they ____ talk about former classmates they remembered.| A．could | B．would | C．should | D．will |
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It is usually warm in my hometown in March, but it _____ be rather cold sometime.| A．must | B．can | C．should | D．would |
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