题目内容
---There’s someone knocking on the door. Who _________ it be?
---It must be John. He promised to be here at 8:00.
| A．must | B．can | C．need | D．shall |
B
解析试题分析:考查情态动词用法。A必须；B能够，可能；C 需要；D将会。从句意可知此处表示推测，而must表推测时只用于肯定句，C、D选项意思不恰当，can表推测可以用于否定句和疑问句表示“可能”，所以B选项正确。句意：--有人在敲门。可能会是谁呢？--肯定是约翰。他答应八点钟来这儿了。
考点：考查情态动词用法。
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| A．can | B．should | C．would | D．shall |
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| A．might | B．need | C．would | D．should |
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| A．Shall | B．Should | C．Will | D．Must |
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| A．must not | B．can’t | C．won’t | D．may not |
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| A．should go | B．must have gone |
| C．should leave | D．should have left |
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--- Yes, but I _____ her husband first.
| A．should have told | B．shouldn’t have told |
| C．must have told | D．needn’t have told |
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