Ex1 :
Những câu bị động là :
(2) (4) (6) (8) (9) (10) (12) (14) (15)
Ex2 :
1. made
2. bought
3. made
4. drunk
5. parked
6. dug
7. taken
8. invited
9. engaged
10. done
11. marked
12. expected
13. fed
14. looked after
15. driven
Ex3 :
1. find = > found
2. took = > taken
3. located = > is located
4. with = > by
5. in 2000 by my brothers = > by my brothers in 2000
6. cutted = > cut
7. were founded = > was found
8. litter = > littered
9. helped = > is helped
10. in = > by
Ex4 :
1. V
2. X
3. X
4. X
5. X
6. V
7. V
8. X
9. V
10. X