1. 按要求改写句子，每空一词。

1. （1） By the time she got up, her mother had gone to work.（对划线部分提问）

     her mother done by the time she got up?

3. （2） When I got home, my mother had cooked dinner. (改为否定句) 

   When I got home, my mother  cooked dinner.

5. （3） Have you ever been late for school?（给出否定回答） 

   No,  .

7. （4） Jim has owned the backpack since his tenth birthday.（对划线部分提问）

     has Jim owned the backpack?

9. （5） I was about to go up to my office. At that time I decided to get a coffee first. (合并为一句)  

   I was about to go up to my office  I decided to get a coffee first.