1 . I sleep with the windows open unless it’s cold. (同义句转换)
I sleep with the windows open ________ it ________ cold.

2 . My mother’s going to meet me at the airport tomorrow. (改为否定句)

My mother ________ ________ ________ meet me at the airport tomorrow.

3 . 他认为这辆车不值得再修了。
He thinks the car ________ fixing any more.

4 . There is a hotel behind the police station.(改为否定句)
________ ________ a hotel behind the police station.

5 . There is a music club in front of the gym.(改为否定句)
________ ________ a music club in front of the gym.

6 . Susan’s brother is working in the hospital.(改为否定句)
Susan’s brother ________ ________ in the hospital.

7 . Our headteacher is old. There ________ (be not) much hair on his head.

8 . Is that your hat? (做否定回答)
No, ______ ______.

9 . —Do you have to clean the room every day?
—Yes. But my sister ________.

A．isn’t

B．doesn’t

C．don’t

10 . Pollution may be the most serious problem if it ________ (not control) in a correct way.