I. Rewrite the following sentences starting with the given words:
1.  People know that cars pollute the environment. 
 It is known that cars pollute the environment.
 Cars are known to pollute the environment.
2.  People believe that the robber has worked in the bank. 
3.  Many people believe that she is an honest person. 
4.  They think that the president will arrive soon. 
5.  It is reported that many passengers died in the crash. 
6.  It is expected that the prices will rise again this month
7.  It is proved that life doesn’t exist on the moon. 
8.  They say that he has passed the final exam with the best result. 
9.  People say that he has been in the army. 
10. It is believed that the man escaped in a stolen car. 
11.  People say that he has been all over the world. 
12.  It is believed that the man is 108 years old. 
13.  People believe that Omachi is from Quang Nam. 
14.  They think that Danny can clean the floor. 
15.  People think that Mai Chi has been punished by the teacher. 
16.  People believe that he worked very hard. 
17.  It is said that they work 14 hours a day. 
18.  Someone thinks that Lan will return tomorrow. 
19.  People think that Lan is living near here. 
20. They think that she is hiding in the forest.