`Answer + Explai n :` 

`32.` The rescue operation which was a success was arranged by a charity organisation.

`->` Which là Đại từ quan hệ thay thế từ danh từ chỉ vật

`33.` If people in the world spoke the same language, there wouldn’t be problems in communication.

`-` Câu điều kiện loại 2 `->` Diễn tả giả thiết trái với hiện tại :

`->`  If `+` S `+` Ved/V2 (QKĐ), S `+` would `+` V (nguyên thể)

=>

32. The rescue operation which was a success was arranged by a charity organisation.

-> which: đtqh chỉ vật 

33. If people in the world spoke the same language, there wouldn't be problems in communication.

-> câu điều kiện loại 2: If S V2/ed, S would V