用所给词的适当形式填空。

l. Ask questions            (active).

2. Don't            (eat) in class.

3. We learned the            (twelve) lesson yesterday.

4. Would you like two cups of            (tea) ?

5. Please get some             (leaf) for me.  

6. The children are playing with (they)            toys.

7. Peter is a good boy. He            (do) his homework every evening.

8. I           (be) at home yesterday evening.

9. Would you like             (swim) with us ?

10. They             (buy) ten balloons for the birthday party a week ago.