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.