9. The knife in the box is Tonny's. (改为复数形式) 

The       in the boxes       Tonny's.

8. We had a picnic in the park last week. (用next week改写句子)

We               a picnic in the park next week.

7. He asked, "Will I go blind?" (改为宾语从句) 

He asked       he       go blind.

6. Peter does well in basketball. He does well in football too. (合并为一句)

 Peter does well in       basketball       football.

5. My father always continues to work after he gets home. (改为简单句) 

My father always continues to work after               

4. There's only a little water in the river. (对画线部分提问) 

                 water is there in the river?

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

I       think that he       coming tomorrow.

2. She learns English by listening to tapes. (对画线部分提问)

               she learn English?

1. I saw that he was playing computer games. (改为简单句)

I saw            computer games.

10. When I got home,my little brother was busy making his model plane.

When I got home,my little brother was              his model plane.