— _________

A

   Look at the photo. Can you see the boy in the photo? That is an American (美国的) boy. He is my good friend. His name is Jim Green. He is tall, and his hair is blond. He likes blue. Oh, who is that girl? That is his sister Betty Green. She has a long face and big eyes. She likes blue, too. They are in Beijing now. They are in No. 4 Middle School. Jim is in Class 6, Grade 8. His Chinese teacher is Miss Wang. Betty is in Class 2, Grade 7. Her Chinese teacher is Mr. Zhong. Jim is twelve. How old is Betty? Sorry, I don't know. Can you guess?

B

    My name is Jim. This is a photo of my family. The man in a black shirt is my dad. The woman next to him is my mom. She is in a black skirt. The girl in red is Sue. She is my sister. The tall boy is me. My T-shirt is white. We live in Beijing now. We are happy.

— I ____ it's Li Ming's.

A：Hello, Mike, is this your pencil?

B：Yes, it is. Thank you.

A：Is this your book?

B：No, it isn't. I think it's Mary's.

A：Mary, is this your book?

C：No, it isn't. My book is here. Ask（问）Bill. Maybe（也许）it's his.

A：Bill, is this your book?

D：Yes, it is.

A：Here you are.

D：Thank you very much. But where is my bag?

— Yes, she knows ____.

— They are mine.