阅读理解。
My name is Bill. I’m    American boy. I’m twelve. I’m a student      Jinling primary school. I’m in Class 4, Grade 6. Li Lei is my friend . We’re in      class. He is eleven. Here is a picture of      family!    look at it .His father, the one behind the tree, is a policeman. His mother, the one in the red hat, is a teacher of Chinese. He has  _ sisters. They are twins. Their names are Li Fangfang and Li Fangling. They have a cat.____ name is Mimi. Look! It’s    the floor under the table.The twins are middle school students. They are in different     .  They usually help us      our English. We are good friends. 
（1）A. the     B. a             C. an          D. /
（2）A. to      B. of            C.in           D. at
（3）A. same    B. different      C.the same     D. some
（4）A. him     B. my            C. her         D. his
（5）A. Let’s   B. It’s         C. Let         D. It
（6）A. five    B. two           C. three       D. four
（7）A. it       B. it’s         C.its          D. His
（8）A. on      B. in            C. to          D. behind
（9）A. class   B.family         C. school       D. classes 
（10）A. for     B. with          C. at          D. in