四、阅读短文，选择正确答案。
This is a picture of a family. The grandfather's name is Harry Smith. The grandmother's name is Jean Smith. They are very old. They are Americans. The father's name is Lake Smith. He is 44. The mother's name is Kate Smith. She is 40. They have a son of ten and a daughter of fifteen.
The son's name is John Smith. And the daughter's name is Mary Smith. They are students of No. 12 Middle School. Kate is a teacher of the same school. Lake is a policeman. It's a very good family.
() 1. Lake Smith's parents are .
A. American B. Americans C. America
() 2. John's father is .
A. very old B. 40 C. 44
() 3. Mary's mother is a .
A. teacher B. policeman C. doctor
() 4. John and Mary are students of .
A. No. 12 Middle School B. No. 12 High School
C. No. 11 Middle School
() 5. Who is a policeman?
A. John's grandfather. B. John. C. John's father.

1. B 2. C 3. A 4. A 5. C