蚯蚓多的土壤变得疏松富有肥力，体现的是（　　）

   How are you, Lin? I’m writing1 you at my school. It’s a big middle 2. I’m in a big class. There’re fifty students in my class. There are about two hundred teachers in my school. My  English teacher 3 Miss Liu. 4 is a nice teacher.
   We go to school 5 Monday to Friday. There are four classes in the morning and two in the afternoon. We play games 6 four on Friday after class.
   I have some friends at school. One is 7 America. She speaks English and 8Chinese. I like to play 9 them. We 10 football. That's my favourite game.