用所给词的适当形式填空。
1. Li Ping decided ____________ (make) his breakfast.
2. Please help the children ____________ (do) their homework.
3. I found the little girl ____________ (cry) in the corner.
4. ____________ (not take) a shower when you are ill in bed.
5. Let's ____________ (buy) some hamburgers and soda.
6. We had fun ____________ (swim) in the water yesterday afternoon.
7. His father made him ____________ (go) to bed before 10:00 every evening.
8. Every student wants ____________ (clean) the classroom.
9. One of the animals ____________ (be) very friendly and intelligent.
10. Who can ____________ (write) an English article?
11. Listen! She ____________ (sing) in the next room.
12. He ____________ (see) the police officer last night.