按要求改写下列句子。

1. He isn't confident in himself. (改为同义句)

    He _____ _____ _____ in himself.

2. I'm not good at maths. (改为同义句)

    I _____ _____ _____ maths.

3. Pwter will improve his spelling. (改为一般疑问句)

    _____ Peter _____ his selling?

4. We have a piece of paper. (就划线部分提问)

    _____ _____ _____of paper do you have?

5. She didn't go to school because she was ill. (改为同义句)

    She didn't go to school _____ _____ her illness.