1. t

2. f

3. t

4. f

5. t

17. a

18. a

19. b

20. a

21. b

22. d

2. near

3. on

4. school bag

5. next

6. untidy

7. not

8. his

1. b

2. d

3. c

4. d

5. b

6. d

7. a

8. d

9. d

10. có thể là until ạ

1. d

2. c

3. c

4. a

5. b

6. a

1. c (idea)

2. d (great)

3. a (like)

4. a (center)

5. b (laundry)

1. have visited

2. have they lived

3. moved

4. has read

5. has been

6. did/call

7. moved

8. has been

9. did you meet

10. spent

11. have you ever been/haven't been

12. heard

a

1. a

2. b

3. c

4. d

5. a

31. a

32. a

33. d

34. b

35. c

36. b

37. b

38. a

39. d

40. a