He is used to listening to music while doing his homework.

It is impossible to finish this experiment in three hours.

We can't imagine what exists on that distant planet.

Although smoking is common, it is very harmful to people's health.

6. The futures market is collectivized and standardized.

7. The return of Hongkong and Macau has put China in a strong position in the world politics and economy.

8. There are so many daily uses of computers that there is no it business world that will not work.

9. In order to prevent our eyes from being stimulated by sunlight, we put on a black sleep mask.

10. Experience has proved that development is a slow and difficult process, but it is not impossible.

1 1. Other types of standard risks, the three most important of which are FPA, WPA and All Risks.

12. It is very important for college students to participate in social practice.