It is vital that every piece of equipment ________ before the experiment.A．is ch
题型：不详难度：来源：
It is vital that every piece of equipment ________ before the experiment.| A．is checked | B．will be checked | | C．be checked | D．must be checked |
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答案
| C |
解析
| 本题考查虚拟语气。句型Itisvitalthat中，从句中谓语动词用should 加 动词原形，should通常可以省略。 |
举一反三
----Thank you very much for giving me a hand when I was in trouble.
------Don’t mention it. I only did what anyone else _______ in my place. | A．must do | B．might do | C．would have done | D．can have done |
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—Will you read me a story, Mummy?
—OK．You have one if you go to bed right away．| A．will | B．might | C．shall | D．could |
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—Most of the students went to the party yesterday. It is a pity you were absent.
—I wish I . But I was terribly busy. |
Thank you so much! But for your text message, I ____ home without my ID card this morning.| A．would have left | B．would leave | C．had left | D．left |
|
— We haven"t been to the Great Wall for ages.
— No, I don"t remember how many years ago _______ I last visited it.| A．it was that | B．was it that | C．it was when | D．was it when |
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