---Listen! Someone is knocking at the door. Who _____it be?
---It _____be Tom. He phoned to visit me this evening.
| A．may; may | B．may; shouldn’t | C．must; can | D．can; may |
Susan’s parents have bought a large house with a swimming-pool. It ____ be very expensive.
| A．must | B．can | C．mustn’t | D．can’t |
This math problem .
| A．can be easily work | B．can be easily worked |
| C．can is easily worked | D．may easily worked |
Trees in winter but in spring.
| A．not can be planted | B．can be planted |
| C．can’t be planted | D．can plant |
Those people without children ________good care of by the government there.
| A．are taking | B．are taken | C．have taken | D．were taking |
---- Is Ann knocking at the door?
--- No, it ______ be Ann. She has gone to Beijing.
| A．can’t | B．mustn’t | C．needn’t | D．may not |
Our classroom _____ every day, so it’s very clean.
A. cleans B. is cleaned C is cleaning. D. cleaned
---Could I borrow your dictionary?
---Of course you ________.
| A．could | B．can | C．must | D．should |
The world has a big headache and it _______ by money. It began in America last year.
| A．cause | B．causes | C．is caused | D．are caused |
— Must I answer this question in English?
— No, you_________.
| A．mustn’t | B．needn’t | C．can’t | D．shouldn’t |
In order to make Chongqing more beautiful, lots of trees _____ on both sides of the street.
| A．should build | B．have built | C．must be built | D．will build |
---Look, Sue is over there.
--- That ____ be her. She is in Canada now.
| A．mustn’ t | B．can’t | C．needn’t | D．won’t |
--- It’s difficult for the village children to cross the river for school.
--- I think a bridge _______ over the river.
| A．should be built | B．is being built | C．has been built | D．was built |
Nick _______a job, but to our surprise, he didn’t take it.
| A．is offered | B．offered | C．was offered | D．has offered |
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