8. Mary is a brave girl. (改为感叹句) 

               girl Mary is!

7. My father likes classical music. (完成反意疑问句)

My father likes classical music,             ？

6. My sister likes red. (用white改为选择疑问句)

      your sister like               ？

5. Mozart was born in Austria in1758, (对画线部分提问)

                 Mozart born?

4. He became interested in computers when he was ten. (改为简单句) 

He became interested in computers                   ten.

3. What a beautiful girl she is! (改为同义句) 

             the girl is!

2. Alan can sing both popular songs and classical songs. (改为同义句) 

Alan can sing         popular songs              classical songs.

1. I don't know. Where was he born?(合并为一句)

I don't know      he      born.

5. 王先生不仅是我们的老师，而且还是我们的朋友。 (not only... but also...)

4. 你知道这个国家因什么而闻名吗？ (be famous for)