句型转换。

1. He is so young that he couldn't go to school. (改为同义句)

    He is _____ _____ _____ _____ to school.

2. I prefer to do sports rather than watch TV at home. (改为虚拟语气)

    I _____ _____ do sports _____ watch TV at home.

3. Do you have other things I can do for you? (改为同义句)

    Do you have _____ _____ I can do for you?

4. It's a pity that I can't further my research work because I have no chance. (改为同义句)

    If I _____ a chance, I _____ further my research work.

5. I had to do my homework at home yesterday. (改为一般疑问句)

    _____ you _____ to do your homework at home yesterday?

计算机的硬件组成可以分为4个层次：第一层是______，第二层是板卡，第三层是设备，第四层是网络。