改写句子 按括号中的要求完成句子，每个空格填一个单词。
1. They are cleaning the classroom. (改为否定句)
They ____________ ____________ cleaning the classroom.
2. Mike borrowed five hundred dollars from his cousin. (就句子画线部分提问)
____________ ____________ did Mike borrow from his cousin?
3. “Do you often spend time with your grandparents?” Lucy asked me. (改写句子，句意不变)
Lucy asked ____________ I often ____________ time with my grandparents.
4. If we don’t help him, he won’t be able to finish the work on time.（改写句子，句意不变）
It’s ____________ for him to finish the work on time ____________ our help.
5. They usually give these animals food to eat twice a day.（改写句子，句意不变）
These animals ____________ usually ____________ twice a day.
1. are not 2. How much 3. if/whether, spent
4. impossible, without 5. are, fed