The news that the scientists in China are trying the ways to reduce the fog and haze was ______ on the radio yesterday.
We were going out for a walk ________ it began to rain.
— What did Tina say just now? — She asked ____ this summer holiday.
Bill’s fully ____ from his heart disease. He is very happy.
While____the dog,you should take care not to____.Otherwise,it may be dangerous to strangers.
Tom ____ skating, so he spends all his spare time on it.