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.
