33. Mai's teacher suggested that Mai should collect these empty bottles for recycling .

Giải thích :

Cấu trúc : Suggesst that + S + should ( shouldn't ) + V .

34. A mechanic has just been  had repaired my neighbor's car recently .

Giải thích :

Câu bị động ở thì hiện tại hoàn thành :

S + has/have $P_2$ + O

`->` S + has / have been $P_2$ + O.

35. A girl who was chatting on the internet with me two months ago is a mysterious girl .

Giải thích :

Mệnh đề quan hệ : Who ( chỉ người ) dùng để thay chủ ngữ 2 , sau N chỉ người ở chủ ngữ 1.

36. If he saw that sight , he could tell you about it.

Giải thích :

Câu điều kiện loại 2 :

If + S + Vpast + O , S + would/could/might + Vbare + O.

33. Mai's teacher suggested that Mai should collect these empty bottIes for recycling

34. A mechanic has just repaired my neighbour's car recently

35. A girl who was chatting on the Internet with me two months ago is mysterious

36. If Jack saw it, he would tell you about that sight.