将下列句子变成定语从句
问题描述：
将下列句子变成定语从句
1.This is the material.The glass is made from the material.
2.the speech bored everyone. the speech went on and on.
3.I still remember the time we. know each other at that time.
4.a country should be one. acountry can provides health,comfort and freedom for its people.
5.you should answer the question. we have talked about the question forseveral times.
6.the best this is to study hard. you can the thing.
答
1.This is the material from which the glass is made./This is the material which the glass is made from.2.The speech which bored everyone went on and on./ The speech which went on and on bored everyone...