高一英语从句填空

问题描述:

高一英语从句填空
12they talked about the things and persons( )they remembered when they sstudied at the school.
13this was the best help( )i could give you at that time.
14 is thiscompany the one( )you worked half a year ago?
15they have to sell the farm( )they bought 2 weeks ago.

楼上的回答错了,WHAT不能引导定语从句`
12.that,which或者\
13.同上
14.where或in which
15.同12