`19.` Her driving lisence was seen near the bridge.

`20.` Researches on AIDS were begun to carry out by scientists in 1981.

`-` "by+O" đứng trước trạng từ chỉ thời gian.

`-` carry out : tiến hành thí nghiệm

`21.` The bridge was built 10 years ago.

`22.` Everything will be arranged by me in time.

`-` in time : đúng giờ

`-` Bị động tương lai đơn : S + will + be + V-ed/c3 + ... + (by+O)

`23.` The windows were broken by the boys yesterday.

`24.` Nam's wallet was stolen.

`-` `-` Bị động quá khứ đơn : S + was/were + V-ed/c3 + ... + (by+O)

Bị động:

- QKĐ: S + was/were + V3/ed 

- S + began +to be + V3/ed 

- TLD: S + will be + V3/ed 

--------------------------------------------

19. Her driving license was seen near the bridge. (sửa đề: lisence --> license)

20. Researches on AIDS began to be carried out by scientists in 1981.

21. The bridge was built 10 years ago.

22. Everything will be arranged in time.

23. The windows were broken by the boys yesterday.

24. Nam's wallet was stolen.

`color{orange}{~MiaMB~}`