已知集合A＝{－1,1,2,4}，B＝{－1,0,2}，则A∩B＝________.

My mother is a village woman, that is already in her fifties. She has a little education, but she knows knowledge is of greatly importance to young people. She often asks me how I get along for my studies and encourages me study hard. My mother do everything she can for me so that I can spend more time on my studies. Once she was badly ill and had stayed in bed for several day. When I got home, I found the light was still on and my mother was sitting in bed, made new clothes for me! I was so deeply moving that tears came to my eyes. Such is my mother, a kind but hard-working woman.