By the time I arrived at the airport, she_____ for New Zealand.
A. would be leaving B has left C will have left D had left
-Can you keep a secret?
-You __________ worry-I'm not going to mention it to anyone.
| A．needn't |
| B．couldn't |
| C．mustn't |
| D．won't |
Just be patient. You __________ expect the world to change so soon.
| A．can't |
| B．needn't |
| C．may not |
| D．whether |
The door __________ open, no matter how hard she pushed.
| A．shouldn't |
| B．couldn't |
| C．wouldn't |
| D．mightn't |
He __________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
| A．wouldn't |
| B．shouldn't |
| C．couldn't |
| D．mustn't |
-You needn't take an umbrella. It isn't going to rain.
-Well, I don't know. It __________ do.
| A．might |
| B．need |
| C．would |
| D．should |