1. They think that he has died a natural death.

A, It is thought that he has died a natural death.     

B, They thought that he died a natural death.

C, He is thought to have died a natural death.          

D, A & C are correct

2. They say that John is the brightest student in class.

A, They said that John is the brightest student in class.

B, They said that John to be the brightest student in class.

C, John is said to be the brightest student in class.       

D, It is said that John to be the brightest student in class.

3. People say that the American women are used to living independently means

A. It is said that the American women are used to living independently.

B.The American women are said to be used to living independently.

C.The American women are said they be used to live independently.                  

 D.A & B are correct

Bị động đặc biệt dạng Somebody + think/ expect/ believe/ estimate/ say/ report + that + someone + do something
→ Cách 1: It is thought/ expected/ believed/ estimated/ said/ reported that someone + do something
→ Cách 2: Someone is thought/ expected/ believed/ estimated/ said/ reported to do something