题目内容
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 |
解析
— 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 |
“No student,” the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission.”
| A．must | B．will | C．shall | D．may |
How ________ you say that you really understand the whole story if you have covered only a part of the article?
| A．can | B．must |
| C．need | D．may |
I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house. (2012·新课标全国，30)
| A．couldn’t | B．mustn’t |
| C．shouldn’t | D．needn’t |
—Jenny took the 8： 00 bus to Guangzhou this morning.
—Really? She ________ the 9：00 train. It's much more comfortable and safer to travel by train.
| A．could have taken | B．should take |
| C．must have taken | D．can take |
—Show me your permit, please.
—Oh, it's not in my pocket. It ________.
| A．must have fallen out | B．might fall out |
| C．could fall out | D．should have fallen out |
—Where did you get this book?
—I picked it up from a secondhand bookshop if you ________ know.
| A．must | B．will |
| C．can | D．shall |
I felt surprised that anyone of his intelligence ________ such an easy test.
| A．might have failed | B．could have failed |
| C．should have failed | D．must have failed |