1.Wheat which is grown in many parts of our country is a plant.
2.Is the pen you lost yesterday on the teacher's deak?
3.That comrade who you have talked to is the head of our workshop.
4.Do you know the boy whose mother works in the factory near our school.
5.We learned the news from the man lives in the next room.
6.This is the first story that he has written it in English.
7.The teacher wants to talk to the students whose homework hasn't been handed in.
8.I have a brother whom is an engineer.
9.He is a singer whom I know very well.
10.The boy is my younger brother whom was here a minute ago.
11.I can give you the ruler which you wanted to borrow it.
12.She'll never forget the day when she first came to the school.