用情态动词 can, can't, may, must, have to, needn't 或 mustn't 填空 。
1. You ________ smoke here. It's dangerous.
2. I haven't got any money with me, so I'll ________ borrow some from my friends.
3. —________ I come in?
—No, you ________.
4. Tomorrow I ________ go shopping with you if it's fine.
5. You ________ not make so much noise in the hospital.
6. —________ I watch TV this evening, Mum?
—Yes, you ________. But you ________ finish your exercises first.
—All right. ________ I write down all the words in this lesson?
—No, you ________, but you ________ write down all the new words today.
You ________ write down the old ones tomorrow.
7. Li Lei isn't in the classroom. He _________ be at the library. Let's go and find him.
8. —Must we hand in our homework today?
—No, you don't ________.