1. 告诉我火车发车的时间。
Tell me the time when / at which the train leaves.
2. 你会有些在家学习英语的业余时间。
You'll have some spare time when / during which you can learn English at home.
3. 这就是我过去上学的那所学校。
This is the school where / at which I used to study.
Think of a place where / to which we can go for dinner.
That is the reason why / for which I don't want to go.