---Who is the tallest boy? ---It ______ be John.. John is of medium height.
题型：不详难度：来源：
---Who is the tallest boy?
---It ______ be John.. John is of medium height.| A．must | B．needn’t | C．might | D．can’t |
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答案
| D |
解析
试题分析：句意：——那个个子最高的男孩是谁？——他不可能是约翰。约翰是中等身材。A. must一定，用于肯定句，有把握的推测。B. needn’t 不必。C. might 可能，没有把握的推测。D. can’t 不可能，有把握的推测，表示否定。根据John is of medium height.可知约翰不是最高的男孩，因此不可能是他。故选D。 |
举一反三
.--- Where is your father?
--- I"m not sure. He_______ in the office.| A．must be | B．maybe | C．may be | D．perhaps |
|
— Who’s singing in the next room?
— It ______ be Mary. She ______ New York. | A．mustn’t, is in | B．must, has gone to | C．could, has been in | D．can’t, has gone to |
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When you play basketball, you ______ hold the ball and run with it.
A. mustn’t B. needn’t C. couldn’t |
—There is a pen on the ground. Is it Li Long’s?
—It Li Long’s. He went to Beijing many days ago.| A．can be | B．can’t be | C．must be | D．might be |
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---It _______be from that time. The dress looks so modern.| A．mustn’t | B．can’t | C．won’t | D．wouldn’t |
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