用be动词的适当形式填空，完成下面短文

Hello! IWu Haiyuan. My English name Betty. Therethree people in my family. They are my father, my mother and I. I have two pen friends. They Ann and Linda. They from America. Ann and Linda in Grade Two, but Ann in Class Three, and Linda   in Class Four. Iin Class One, Grade Two. We very happy every day.