—There"s someone knocking on the door．Who it be?—It must be Mary．She prom
题型：不详难度：来源：
—There"s someone knocking on the door．Who it be?
—It must be Mary．She promised to be here at 8：00．| A．must | B．can | C．shall | D．need |
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答案
| B |
解析
试题分析：句意：--有人在敲门。可能会是谁呢？--一定是Mary。她答应八点钟到这里。A. must一定，表主观肯定推测；B. need需要；C. shall将会是；D. can可能，表示怀疑、猜测、惊异（主要用于否定句或疑问句中）。故选B
考点: 考查情态动词的用法。 |
举一反三
—Can I pay the bill by check?
—Sorry，sir．But it"s the management rules of our hotel that payment be made in cash． |
It be the vocabulary that caused you the problem in the exercise because you know a lot of words.| A．couldn’t | B．may | C．should | D．needn’t |
|
—I heard they went skiing in the mountains last winter.
—It true because there was little snow there.| A．may be not | B．won’t be | C．couldn’t be | D．mustn’t be |
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—Who bought you the fresh flower?
—It’s from my girlfriend, if you ______ know.| A．have to | B．must | C．will | D．might |
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I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house.| A．mustn’t | B．needn’t | C．shouldn’t | D．couldn’t |
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