1. 按要求改写句子

1. （1） We want to set off early so that we can avoid the heavy traffic．(改为同义句)

   We want to set off early    avoid the heavy traffic．

3. （2） I think that he is coming tomorrow.(改为否定句)

   I think that he coming tomorrow． 

5. （3） There's only a little water in the river．(对划线部分提问)

     water is there in the river?

7. （4） The girl didn't know where she could find her mother．(改成简单句)

   The girl didn't know where  her mother．

9. （5） Martin used to give his mother a lot of trouble．(改为否定句)

   Martin   to give his mother a lot of trouble.