根据上下文内容，填入适当的单词。(每空一词)
I am from the USA. My name is Helen. I am Liu Tao's penfriend. Liu Tao is twelve years old. I'm as old as
him. There are four people in my family. My father is a doctor. My mother teaches English in a primary school.
My brother Jack is only four years old. He is lovely. We all love him very much.
Liu Tao a penfriend. name is Helen. She's an girl. There are people in
her family. Her father works in the , and her mother is a .
