=>
1. When was the song written by him?
-> bị động QKĐ was/were S V3/ed?
2. Bicycles must not be left in the hall.
-> bị động must (not) be V3/ed
3. Our tests have recently been returned to us by the teacher.
-> bị động HTHT have/has been V3/ed
4. A party is being held tomorrow.
-> bị động HTTD is/am/are being V3/ed
5. A lot of trees were planted along the street by the students last year.
-> bị động QKĐ was/were V3/ed
6. Is this road used very often?
-> bị động HTĐ Is/Am/Are S V3/ed?
7. Three cats have been rescued by the volunteers.
-> bị động HTHT have/has been V3/ed
8. Their house had been repaired before the typhoon came.
-> bị động QKHT had been V3/ed
9. Rescue workers will be sent to the flooded villages.
-> bị động will be V3/ed
10. The paintings will be exhibited by the organizer till the end of the month.
-> bị động will be V3/ed