III, Rút gọn các mệnh đề quan hệ 1, She is the woman who has lived in Hanoi for 20 years 2, This is the book which was bought yesterday 3, This is the only man who comes first 4, She is the most beautiful girl that win in this contest. 5, The girl who is wearing in red is my sister 6, The village which is located in the mountain is very beautiful 7, Peter, who is the helpful leader, is very nice 8, The book which is written by Mr. John is very interesting 9, It is the only child who can climb that big tree. 10, The boy who is drawing a picture is my son.