According to the air traffic rules, you______switch off your mobile phone before
题型：不详难度：来源：
According to the air traffic rules, you______switch off your mobile phone before bearding.| A．may | B．can | C．would | D．should |
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答案
| D |
解析
| 此题考查情态动词的用法。根据句意“按照空中交通规则，你应当在登机前关掉你的手机”，所以只有should(应该，应当)符合题意。 |
举一反三
_____ U2, the Irish rock band from Dublin perform a concert in Beijing, tell me in advance.| A．If | B．Shall | C．Should | D．Would |
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--- Guess what! I have got A for my term paper.
--- Great! You ______ read widely and put a lot of work into it.| A．must | B．should | C．must have | D．should have |
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---It ________ be, but it is now heavily polluted. | A．will | B．would | C．should | D．must |
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What a pity. Considering his ability and experience, he ____ better.| A．need have done | B．must have done | | C．can have done | D．might have done |
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Peter ______ be really difficult at times even though he’s a nice person in general.| A．shall | B．should | C．can | D．must |
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