People think that Jack London's life and writings represent the American love of adventure

- It is thought that Jack London's life and writings represent the American love of adventure

- Jack London's life and writings is thought to be represent the American love of adventure

They say that John is the brightest student in class.

- It is said that John is the brightest student in class.

- John is said to be the brightest student in class.

They reported that the President had suffered a heart attack.

- It was reported that the President had suffered a heart attack. 

- the President was reported to have suffered a heart attack.

14. They think the owner of the house is abroad.

- It is thought the owner of the house is abroad. 

- The onwer is thought to be abroad. 

15. They rumoured the man was still living.

- It was rumoured the man was still living. 

- The man was rumoured to have still living. 

16. They declared that she won the competition.

- It was declared that she won the competition. 

- She was declared to have win the competition. 

17. they know that english is an international language.

- It is known that english is an international language. 

- English is known to be an international language. 

They knew that she had finished all her work before going out.

- It was known that she had finished all her work before going out. 

- She was known to have finished all her work before going out. 

They believe that she had stolen the money from the supermarket.

- It is believed that she had stolen the money from the supermarket. 

- She is believed to have stolen the money from the supermarket. 

People believe that light pollution leads to the change of animal's behaviour patter

ns.

- It is  believed that light pollution leads to the change of animal's behaviour patter

ns. 

- Light pollution is  believed to be leads to the change of animal's behaviour patter ns

10. They know that the children are playing in the garden.

- It is known that the children are playing in the garden.

- The children is known to be playing in the garden.

11. They knew that she had finished all her work before going out.

- It was known that she had finished all her work before going out.

- She was known to have finished all her work before going out.

12. They believe that she had stolen the money from the supermarket. 

- It is believed that she had stolen the money from the supermarket. 

- She is believed to have stolen the money from the supermarket. 

13. People believe that light pollution leads to the change of animal's behaviour patterns.

- It is believe that light pollution leads to the change of animal's behaviour patterns.

- Light pollution is believe to be leads to the change of animal's behaviour patterns.

They know that the children are playing in the garden.

- It is known that the children are playing in the garden..

- The children is known to be playing in the garden.

They think that The poisonous chemical waste is dumped into the river.

- It is thought that The poisonous chemical waste is dumped into the river. 

- the poinsonous chemical waste is thought to be dump into the river. 

T kém Anh lắm. Biết có vài 3 câu thì giúp bạn bấy nhiêu đấy thôi !!!

Sorry.

They believe that air pollution cause some health problems for people in the city.

- It is believed that air pollution cause some health problems for people in the city.

- Air pollution is believed to cause some health problems for people in the city.

People say that the company dumped the waste into the lake nearby.

- It is said that the company dumped the waste into the lake nearby. 

- The company is said to have dumped the waste into the lake nearby.

It was romoured that the company went bankrupt.

The company was romoured to have gone bankrupt.