We know the air is very important for us. Without air, we couldn't live. Other creatures can't live either. We need clean air. The dirty air is bad for us. Now the air pollution is very serious in some places. For example, the smoke from some factories make the air dirty. Exhaust gas from cars make the air dirty. The forest fire can make the air dirty, too. So we need to pay attention to the air pollution. We can plant more trees and think of other ways to sovle the problem.

Zhang Peng：Hi, Wang Ping. You look fine. How heavy are you?

Wang Ping：I'm 48 kilograms. You are thinner than me, but you look taller than before. How tall are you?

Zhang Peng：I'm 1.6 metres and 45 kilograms.

Wang Ping：Oh, really? You are 0.05 metres taller than me. But I'm 3 kilograms heavier than you. You should eat more.

Zhang Peng：OK, I will. Thank you.

    Hello, I'm Zhang Peng. This is my family photo. They are my grandparents, my parents and me. My grandpa is strong and tall. He's a farmer. He likes sports. My grandma is a nurse. She likes painting. My mother is a teacher. She's thirty-two. She likes music. My father is a doctor. He likes music, too. I love my family!

    London is a big city. There are many interesting places in it. Buckingham Palace is Queen's house. It's very beautiful. Big Ben is tall and old. Hyde Park is a beautiful park. Tower Bridge is famous and beautiful. I want to visit London.