18.B. interesting -> interested
19. C. swim -> swimming
20. A , am -> was
21. D
22. C
23. C
24. A
25. B
26. b
27. b
28. c
29. b
30. d
31. No one in the class is taller than Hang .
32. My sister is good singer .
33. It is convenient to live in a big city .
34. My brother often goes to school by bike .
35. My young sister would become a flight attendant in the future.
36. What did they do in the park yesterday ?
37. Physics is one of his favourite subject because he enjoys doing experiment .
38. She bought a comic book at the bookshop last Wednesday .
Hok tốt!
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