句型转换。

1. That is my good pen friend. (改为复数句子)

    _____ _____ our good pen _____.

2. This is her family photo. (变为一般疑问句)

    _____ _____ her _____ photo?

3. Tom is Mr Green's son. (改为同义句)

    Mr Green is _____ _____.

4. Those are my friends. (对划线部分提问)

    _____ _____ those?

5. They are orange backpacks. (改为单数句子)

    _____ _____ orange backpack.