按要求写句子。

1. This is my pencil. (改为复数句)

    _______ _______ my pencils.

2. My backpack is on the chair. (对画线部分提问)

    _______ _______ your backpack?

3. That is her pencil case. (改为一般疑问句)

    _______ _______ her pencil case?

4. His telephone number is 110 - 7856. (对画线部分提问)

    _______ _______ his telephone number?

5. Bob has seven baseballs. (对画线部分提问)

    _______ _______ baseballs does Bob have?