Do remember to be ________. We must avoid any possible risks when doing this dangerous chemical experiment—burns, poisonous gases or cuts from broken tubes.

All the settlers nearby demanded that the night club       away as soon as possible.

It _____ to chat online all day long. You’d better do something else.

For a moment nothing happened. Then 　　　　 all shouting together.

The police ________ Tom of stealing and the accused was afraid to meet the accuser.

He found them _____ at a table ____ chess.

More and more high－rise buildings have been built in big cities 　　　　 space.

 He is _____ careless a student that he often _____ some letters while writing.

In my opinion, the most famous 　　　　 to tourists in the city is the wooden tower.

_ _ busy schoolwork, the children also have to take arts, music and sports classes in their free time.