1. 句型转换。

1. （1） Would you mind opening the door?(改为同义句)

   Would you mind open the door?

3. （2） My favorite food is dumplings. (对划线部分提问)

   favorite food?

5. （3） I wanted to know. How did you make sandwiches?(合并为含宾语从句的复合句)

7. （4） Mike arrived earlier than anyone else in his class. (改为同义句)

   Mike arrived in his class.

9. （5） You'd better cook chicken soup tonight. (改为否定句)

   You'd cook chicken soup tonight.