句型转换
This is a ruler（对划线部分进行提问)
________ ________ this？
It’s his jacket. (改为否定句)
________  ________ ________ jacket.
This is my mother’s watch. (改为一般疑问句，并作否定回答)
________  ________ ________mother’s watch?
________, ________ ________.
My telephone number is 257-3355.（就划线部分提问）
________ ________ ________ ________?