1. A: What is your plan for the coming vacation?
B:I'm going to Taiwan, ( where / when ) my nephew lives.
2. A: Where did you meet each other?
B: We met on this campus, ( when / where ) we studied together.
3. A: Did your father come back from abroad?
B: Yes. He came back two days ago, ( which / when ) I was on
the school trip.