29 environmentally

30 limitations

31 northerly

32 possible

33 commercial

34 advertising

eagerness

where my father worked then

the good performance, she lost the match

, who sings Western folk songs very well, can compost songs

the first time I've ever read such an interesting book

conservative : bảo thủ

1A 2C 3D 4B 5C 6A 7C 8B 9C 10C 11B 12A 13D 14D 

deforestation

modernized

effective

environmentalists

fantastically

35. I suggest that different kinds of waste should be put in different places.

36. Tet is a time for families to decorate their homes and enjoy special food.

37. If you don't watch TV everyday, you won't know much new news.

38. Because we were tired, we fell asleep in front of the TV.

39. Is the river which flows through that town very large?

40. I suggest the lights should be turned off before going out of the room

1b 2c 3c 4a

carefully

Because he stayed up late playing games, he was very tired