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 ________.