=>
1. The lesson is explained by the teacher.
-> bị động HTĐ is/am/are V3/ed
2. The food is being cooked in the kitchen by Mrs Green.
-> bị động HTTD is/am/are being V3/ed
3. The patients were examined by the doctor.
-> bị động QKĐ was/were V3/ed
4. That noise was made by these boys.
-> bị động QKĐ was/were V3/ed
5. English is spoken all over the world.
-> bị động HTĐ is/am/are V3/ed
6. He was given back the money last Sunday.
-> bị động QKĐ was/were V3/ed
7. These exercises can't be done quickly.
-> bị động can't be V3/ed
8. We have been disappointed very much by the movie.
-> bị dộng HTHT have/has been V3/ed
9. The bill has to be paid before the first of the month.
-> bị động have/has to be V3/ed