ice, the postman refused to deliver our letters unless we changed ourdog.

We work together to achieve our common purpose： ________ world that is safer, cleaner and healthier than ________ one we are living in.

What’s wrong with your car – Well, as you know, cars usually_______start in winter.

______time went on, the people in the area came to realize how serious the environment had been polluted

_____tea and coke are you goingto buy