Вставить пропущенные слова are, am, is I....a boy. they....birds. you.....a girl.

I am a boy. They are birds. You are a girl. She is my mother. We are boys. It is a dog.  You are girls. I am a sister. She is a doctor. He is a brother. We are friends. I am a pupil. He is a driver. She is a student. They are children. We are singers.