1. Water is made to run downhill by gravity
2. He has been believed to have kidnapped her
3. The difficultty had better be explained to him
4. (chị chưa biết làm cau này)
5. Who was the person Pike told about yesterday?
6. who is the person you took out to dinner?
7. When was the school report sent to them?
8. It is said that Arthur is very rich
9.He is thought to be very intelligent
10. It is believed that you will work hard