=>
11. Have the Christmas cards been sent to your family?
-> bị động HTHT Have/Has S been V3/ed?
12. Alice was appointed secretary for the meeting by the committee.
-> bị động QKĐ was/were V3/ed
13. The broken cup is hidden in the drawer by him.
-> bị động HTĐ is/am/are V3/ed
14. This room is kept tidy all the time.
-> bị động HTĐ is/am/are V3/ed
15. The party was voted a great success by all of them.
-> bị động QKĐ was/were V3/ed
16. Ann was given some bananas and some flowers.
-> bị động QKĐ was/were V3/ed
17. The fridge was moved into the living room.
-> bị động QKĐ was/were V3/ed
18. Some cups of tea were bought to the visitors in the next room by her.
-> bị động QKĐ was/were V3/ed
19. The new project is found worthless.
-> bị động HTĐ is/am/are V3/ed
20. The note wasn't taken to the manager by the secretary. (đề bài lỗi)
-> bị động QKĐ was/were V3/ed