$\text{ 11 }$. The test is done well by Mai.

$\text{ 12 }$. Mark 10 is given me by the teacher for my English test.

$\text{ 13 }$. The floor is cleaned by my mother every day.

$\text{ 14 }$. The dog is usually fed by Mrs. Lan.

$\text{ 15 }$. The telephone was invented by Alexandar Graham Bell in 1876.

$\text{ 16 }$. The school gate was repainted by Nam last week.

$\text{ 17 }$. America was discovered by Christopher in 1949.

$\text{ 18 }$. The accident has been seen on the road by Minh.

$\text{ 19 }$. The funny story was told by my father last night.

$\text{ 20 }$. This machine was repaired by Mr. Ha yesterday.

$\text{ *Cấu trúc câu bị động: S + be + V3 + ( by O ) }$

$\text{ be thì HTĐ: am/is/are }$

$\text{ be thì QKĐ: was/were }$

$#Chee$

11. The test is done well by Mai.

12. Mark 10 is given me by the teacher for my English test.

13. The floor is cleaned by my mother everyday.

14. The dog is usually fed by Mrs Lan.

15. The telephone was invented by Alexandar Graham Bell in 1876.

16. The school gate was repainted by Nam last week.
17. America was discovered by Christopher in 1949.
18. The accident has been seen on the road by Minh.
19. The funny story was told by my father last night.
20. This machine was repaired by Mr. Ha yesterday.