1. I was making model planes when my mother came back.(对画线部分提问)
_______ _______ _______ _______ when your mother came back?
2. I think classical music is boring.(改为否定句)
I _______ _______ classical music is boring.
3. My mother was doing the dishes at that time.(同义句转换)
My mother was _______ the _______ at that time.
4. He read a story-book last night.(改为过去进行时)
He _______ _______ a story-book at eight o'clock last night.
5. He wasn't old enough to go to school. (同义句转换)
He was _______ young_______ go to school.

1. A new b___________ will be built over this river. 　　
2. If you want to take pictures, you should have a c___________ at first. 　　
3. Be c____________ with your work. 　　
4. Jerry doesn't like to fall behind. He made up his mind to c__________ up with others. 　　
5. The computer doesn't cost too much. It is very c___________. 　　
6. Please c____________ the correct answer with your red marker. 　　
7. My mother asks me to wash all my c                    , including my shirt, my pants, and my socks. 　　
8. Have you decided which c_____________ you are going to go to? 　　
9. He has a large c____________ of stamps. 　　
10. — Do you like c___________? 　　　　
      — Yes, I enjoy making delicious food.