Viết câu sao cho nghĩa không đổi

----- Nội dung dịch tự động từ ảnh -----
6. Vinfast Automobile Company introduced this new kind of car model last month.
→ This new kind of car model.
7. They started studying vaccine to treat corona virus some months ago.
→ Vaccine to treat corona virus.
8. My daughter solved this Math problem in five minutes.
→ This Math problem.
9. Some musicians mentioned the ao dai in these songs a long time ago.
→ The ao dai
10. They improved all the schools in the district two years ago.
→ All the schools
11. We planted a lot of trees around the school.
→A lot of trees.
12. They cleaned the classroom carefully yesterday.
→ The classroom.
13. Dr. Martin Cooper invented the first mobile phone in 1973.
- The first mobile phone
14. We first used the Internet in 1969.
→ The Internet
15. Peter Cooper made the first driverless plane in 1917.
→ The first driverless
16. Doctor Zhang Jixian found Corona viruses in Wuhan in 2019.
→ Corona viruses.
17. They repaired the engine of the car when they came home.
→ The engine of .
18. They provided the Covid patients with free food and drinks.
→ The Covid patients.
19. A teacher of English installed an air-conditioner for a class in this primary school.
→ An air-conditioner.
20. Billionaire Pham Nhat Vuong founded Vinfast Automobile Company in 2017.
→ Vinfast Automobile Company
21. They repainted the gate of the house last week.
→ The gate
22. The newspapers reported the event immediately.
→ The event.