用who/whom/that/which/when/where/why填空.

用who/whom/that/which/when/where/why填空.
1.Those are the things ____ I lost in the street yesterday.
2.He is the person ____ we often talk about.
3.They talked of things and persons ___ they remembered.
4.They call it Christms,_____ comes from the name Christ.
5.They may go to their own library to look up any infornation ____ they need.
6.Nobody knowns the raeson ____ she didn't come to the meeting.
7.I still remembered the day ____ I was born.
8.Sam never forget the beautiful city ____ he worked in 1998.