12. smells, are ...cooking
13. are falling
14. Did ...hear ; exploded
15. did ...do , put
16. was seeing , doesn't change
17. pased ,got
18. hasn't been, won
19. have never eaten ,ate
20. had .. been, had gone ,have been
21. did Paul and Sue get ,didn't go
22. left, wasn't ,haven't been
23. have just this ,did you spend
24. look,haven't found
25. didn't recognize ,lost
26. have worked didn't give , used .
27. was learning , had never had to ,met, have learnt
28. have broken ,did...do
29. speaks
30. are they speaking
EX3:
1. is learning
2. has been
3. have been writting
4.have also typed
có gì không hiểu hỏi luôn nha
[TẶNG BẠN] TRỌN BỘ Bí kíp học tốt 08 môn
giúp mình vs các bạn ơi