1. English is spoken in many countries.

2. Her helmet was stolen.

3. Their new plan is being discussed by the students.

4. The thief has just been caught by the police.

5. We are taught grammar and writing.

Or: Grammar and writing are taught to us.

6. The electric light bulb was invented by Thomas Edison.

7. Lan's fiends are going to invited to her birthday party.

8. Food should be kept in the refrigerator to keep it fresh.

9. The door of the classroom could not be opened by Lien.

10. That old building must be repaired.

11. All the flights were cancelled because of the storm.

12. You will be given your tickets at the airport.

13. The classroom is being cleaned at the moment.

14. May Day has been considered a great holiday by the working people.

15. Wood has been used for making pulp since the 9th century.

của bạn này

1.people speak english in many countries

>>English is spoken in many countries

2.someone stole her helmet

>>her helmet was tolen

3.the students are discussing about their

>>cau nay co sai de ko bn " about their...." p co j o day cku mjh vj du la lesson nha:

>>Their lesson is being discussed by the students.

4.the police have just caught the thief

>>the thief has benn just caught by the police

5.she teaches us grammar and writing

>>we are taught grammar and writing by her

6.thomas edison invented the electric light bulb

>>the electric light bulb was invented by thomas edison

7.lan is going to invite her friends to her birthday party

>>Lan's friend is going to be invented to her birthday party by her

8.everybody should keep food in the refrigerator to keep if fresh

>>food should be kept in the refrigerator to keep fresh

9.lien could not open the door of the classroom

>>the door of the classrom could not be opened by lien

10.they cancelled all the flights because of the storm

>>all the flights were cancelled because of the storm

11.people must repair that old building

>>that old building must be repaired

12someone will give you your tickets at the airport

>>you will be given your tickers at the airport

13.someone is cleaning the classroom at the moment

>>the classroom is being cleaned at the moment

14the working people has considered may day a great holiday

>>cau nay bn viet dung ko zay

15.since the 9th century,people have used wood for making the pulp

>>>since the 9th century, wood has been used for making the pulp