The jeans are very nice． I'll take them．
You'd better ______ first． I'm afraid the size is a bit small for you．（ ）
| A． |
pay for them |
| B． |
take them off |
| C． |
try them on |
—Another cup of coffee?
—No, thanks. I ________ be off. My friend is waiting for me at the school gate.
| A．can | B．may |
| C．must | D．might |
Must I finish my homework first? No, you ________.
| A．mustn’t | B．don’t |
| C．can’t | D．needn’t. |
The girl is so excellent that you ________ praise her too much.
| A．mustn’t | B．shouldn’t |
| C．can’t | D．won’t |
—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．must; may |
---May I do the rest of the work tomorrow?
---Yes, of course. You finish it today.
| A．must | B．mustn’t |
| C．needn’t | D．could |