用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每词限用一次）

in, English, always, we, cousin, but, thank, number, teacher, friend

    Hello! My name is Mary. Frank is my . He is my uncle's son. He is an boy. He is 14 years old now. He is a student a middle school in Beijing. We are deskmates (同桌) at school. Frank's telephone is 256-5689. We are good .

    Frank's room is very tidy because he likes cleaning(清洁)it. Frank's father is a in our school. He teaches (教) Chinese. And Frank's mother is also a Chinese teacher, she isn't in our school. Frank has a brother. His name is Mike. They are both students. My English is not good, and Frank  helps me with it. I  him a lot for his help. And I hope I can help him Chinese.