一、用适当的关系词填空
1.This is the place       we held a party last week. 
答案where
2.Do you remember the days       we spent together on the farm? 
答案that/which
3.I don’t know the reason       he didn’t turn to his good friend for help yesterday. 
答案why
4.Let’s get to the reason       I’m making this video. 
答案why
5.This is the place       we visited last year. 
答案that/which
6.Do you remember the days       we chatted with each other all night? 
答案when