=>
33. This is the bank from which we borrowed the money.
34. The man whose wallet was stolen called the police.
35. The man who spoke with a strange accent phoned and asked for you.
Which -> đtqh chỉ vật
Who -> đtqh chỉ người
Whose -> đtqh thay thế tính từ sở hữu
Giới từ + whom/which