He ________ the exam, but he was too careless.

Could you tell me ______— Sure. Go along this street and you will find it on your left.

Joan together with her parents ____ going to visit the Summer Palace this Saturday.

The most important thing to keep in ________ mind when dealing with________ emergency is to stay calm.

When it______air pollution, Beijing faces the three “C” s—–cars，coal and construction，which lead to Beijing’s thick air pollution.