=>
I/
1. has been
2. go
3. have you studied/have studied
4. saw
5. have not met
6. are playing
7. have not finished
8. was
Ảnh 2/
26. not to smoke
27. plying
28. to correct
29. to listen
30. playing
31. to go
32. do
33. to go
34. play
35. do
Ảnh 3/
35. smoking
36. to buy
37. to buy
38. spend
39. to tell
40. playing
41. to stay
42. do
43. to buy
44. to buy
45. sitting