A

30. Lucas shouldn't have bought those expensive jeans

shouldn't have P2: lẽ ra ko nên làm gì trong quá khứ

B

31. Parents and children usually do not enjoy the same forms of entertainment

enjoy+ N: thich cái gì

usually=> htđ: S+ do/does+ Not+ V

32. As children grow up, they develope their own opinions about thoughts and styles

develope sth: phát triển cái gì

opinions about sth: quan điểm về cái gì

39. Parents should respect their children's opinions and let them make their decisions on their own

make one's decidion: đưa ra quyết định 

on their own= by thếmlves

should V: nên làm gì

40. While teenagers try to catch up with the latest fashion trends, most parents think those styles are inappropriate.

while clause, clause: trong khi

ss nhất: the adj_est

C

33.  It is a pity that I didn’t apply for that job advertised in the paper.

It is a pity+ that+ clause: Thật đáng tiếc

35. I shouldn't have spent all of my pocket money on clothes

shouldn't have P2: lẽ ra ko nên làm gì trong quá khứ

36. You shouldn't have talked to your mother like that; now she's totally angry

shouldn't have P2: lẽ ra ko nên làm gì trong quá khứ

37. Peter should have listened to his parents' advice

should have P2: lẽ ra nên làm gì trong quá khứ

38. Lucas shouldn't have bought those expensive torn jeans.

shouldn't have P2: lẽ ra ko nên làm gì trong quá khứ