Whose umbrella is this by the classroom door?
教室門邊這把雨傘是誰的?
Do you know whose notebook is on the teacher's desk?
你知道講桌上是誰的筆記本嗎?
I met a girl whose father works at the night market.
我遇見一個爸爸在夜市工作的女孩。
Whose turn is it to clean the blackboard today?
今天輪到誰擦黑板?