完形填空。
My name is Bill. I’m      American boy. I’m twelve. I’m a student at 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 his family! Let’s 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 on the floor under the table.The twins are middle school students. They are in different classes.  They usually help us        our English. We are good friends. 
(    )（1）A. the        B. a              C. an
(    )（2）A. same       B. different       C. the same
(    )（3）A. five       B. two            C. three
(    )（4）A. It         B. It’s          C. Its
(    )（5）A. for       B. with           C. at