18.B->interested

19.C->swimming

20.A->was

21.D

22.C

23.B

24.A

25.B

26.B

27.B

28.C

29.B

30.D

31.No one in my class is taller than Hang.

32.My sister is a good singer.

33.It is convenient to live in a big city.

34.My brother often goes to school by bike.

35.My younger 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 subjects because he enjoys doing experiment.

38.She bought a comic book at the bookshop last Wednesday.

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 .

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