29. Our parents were happy to hear all of us had made considerable progress.
30. Although this is the best solution, there are still others to the problem.
31. extremely-adv sau tính từ pleased: hài lòng, dùng trạng từ
32. active
a/an+adj+N
33. enthusiastic-nhiệt tâm (adj) vì sau đấy là N conservationists: nhà bảo tồn
34. celebrations
35. advanced-adj
36. conservationists
37. Three more new school will be opened in the town by the Prime Minister next autumn.
38. If you don't work hard, you won't pass this entrance examination.
39. You must shut down the computer after 10 p.m.
40. Impressive as the building was, it wasn’t to my taste.

29-> Our parents were happy to hear all of us had made considerable progress.
30-> Although this is the best solution, there are still others to the problem.
31-> Mary was extremely pleased that she passed exam
32-> Tuan is an active student. he take part in many activities in his chool
33-> Thanks to enthusiasticationists  conservationists, many kind of plants and animals are protected

34-> Tet is one of the most important celebrations for Vietnamese people
35-> Our city has had a lot of advanced methods of production
36-> Some conservationists have raised people awareness of rhinos' protection
37-> Three more new school will be opened in the town by the Prime Minister next autumn.
38-> If you don't work hard, you won't pass this entrance examination.
39-> You must shut down the computer after 10 p.m.
40-> Impressive as the building was, it wasn’t to my taste.