用不定式完成下列句子。 1. Have you decided ________ (怎样度假). 2. It is dangerous ________ (玩火). 3. She was the first woman ________ (环球飞行的). 4. The boy was made ________ (重复他自己的故事). 5. The old lady looked at the children ________ (穿过马路). 6. It took me much time ________ (算出这些难题) yesterday. 7. The boss made the workers ________ (一天工作十小时). 8. I don't know ________ (在会上说什么). 9. Can you tell me ________ (在哪里能买到这本书)? 10.________ (在何时召开这会议) hasn't been decided yet.