— It’s no easy task to catch a ticket on a website that receives 1 billion click
题型：不详难度：来源：
— It’s no easy task to catch a ticket on a website that receives 1 billion clicks daily.
—I can’t agree with you more.There ________ be errors for every single step.| A．should | B．must | | C．will | D．can |
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答案
| D |
解析
此处表示“有时会”这个意思，用can可以表示理论上会发生的事，用于肯定句中。此句意为：每一步都可能存在错误。should应该，竟然；must肯定，必须；will将要，均不符合句意。 |
举一反三
Alex changed his mind at the last minute，otherwise we ________ an agreement.| A．should have reached | B．could have reached | | C．can reach | D．should reach |
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—________ you leave your room in such a mess?
—Sorry，Mum.I forgot to tidy it up.| A．Must | B．Can | | C．Should | D．Will |
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It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words. (2013·安徽，34)| A．may | B．couldn’t | | C．should | D．needn’t |
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—Why are your eyes so red？You________have slept well last night.
—Yeah，I stayed up late writing a report. (2013·四川，5)| A．can’t | B．mustn’t | | C．needn’t | D．won’t |
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Since nobody gave him any help，he ________ have done the research on his own.
(2013·大纲全国，26) |
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