—You mean the position is still vacant?
—Yes, but you must know our job is very demanding.
—_______.
| A．With pleasure | B．I don’t mind | C．Don’t mention it | D．That’s all right |
You ________ do the exercise if you don’t want to.
| A．may not |
| B．can’t |
| C．mustn’t |
| D．needn’t |
You _________leave the window open. It’s so cold.
| A．mustn’t |
| B．needn’t |
| C．mightn’t |
| D．won’t |
Facts prove that the world’s economic development is not a win-lose game but one in which all ________ be winners.
| A．can |
| B．shall |
| C．must |
| D．would |
When we lived in that village, we ________ often play together in the river there.
| A．might |
| B．should |
| C．could |
| D．would |
—Isn’t that your boss over there?
—No, it ________ be him. I’m sure he is in the office now.
| A．can’t |
| B．must not |
| C．won’t |
| D．may not |