— Could I watch TV tonight, Mum?
— Yes, you _______. But you _______ go to bed before 10 o’clock.
| A．can; must | B．can; need |
| C．could; must | D．could; may |
– ______ do I have to take the medicine?
– Three times a day, after meals.
| A．How long | B．How far | C．How often | D．How soon |
Actions ______ be taken to stop H7N9 from spreading again.
| A．must | B．may | C．can’t | D．needn’t |
She won’t lose weight______ she keeps a diet and takes exercise every day.
| A．unless | B．if | C．because | D．since |
The little boy denied ______ the window with a stone.
| A．break | B．broke | C．to break | D．breaking |
My mother didn’t expect ______ such a lovely present from me!
| A．receive | B．received | C．to receive | D．receiving |