妈妈的白发(Mothers Gray Hairs)

　　Mother used to have black hair. But recently I have found a few gray hairs on mother's head. I know mother is getting more and more tired. She works in the daytime and cooks for the whole family when she is off work. She is always concerned about my study and life very much. If I fall ill some day, there would grow several more gray hairs on my mother's head．