1. construction

2. traditional

3. assistant

4. lucky

5. visiting

38. B (paint -> painted)

39. C (to work -> to working)

40. A (said -> saying)

46. D

47. D

48. C

49. D

50. B

1. You’d better not eat too much meat.

2. What is your grandpa’s age?

3. Lan received a bike for her birthdya from her parents.

4. I took care of my mother when she was ill.

5. I prefer listening to music at home to going to the concert.

6. The heavy rain prevented us from enjoying the trip.

7. You’d better not eat too much candies.

8. He drives more slowly and carefully than me.

9. The visitors spoke too quickly for me to understand.

10. Mr Hoang spent half an hour walking to work yesterday.

11. How much is this cap?

12. You’d better not eat too much meat.

13. Lan has two older sister.

14. Our house is the oldest one in the living centre.

15. Mai is usually a hardworking person.

16. Hoa’s collection has eight hundred stamps.

17. What is the weight of the chicken?

18. What is the price of this book?

19. I prefer listening to music to watching TV.

20. Jack and Hoa are the same height.

21. The weather is not warm enough for us to go out.

22. We used to write letters when we lived in the countryside.

23. The children enjoyed playing in the rain.

24. What a beautiful house!

25. My grandmother is old enough to be retired now.

26. That bike is more expensive than this one.

27. Shall we go to the post office?

28. Do you want some bananas?

29. They are planning to visit their friends next Sunday.

30. My mother is not as tall as my father.