79、Once environmental damage ______, it takes many years for the system to recover.

9. ( )theWar of Independence, the United States was an England colony.

8. If she wants to stay thin, she must make a( )in her diet.

7. The computer system()suddenly while he was searching for information on the Internet.

6. it’s a good idea. But who’s going to()the plan? I think John and Peter will.

5. The grey building is the place where the workers live, and the white building is the place where the spare parts ( ).

4. They got here an hour()than the others.

3. The harder you study,( )you will learn.

2. ( )you know,David has been well lately.

1. Sunday is the day( )people usually don’t go to work