（二）听对话和问题，根据所听内容，选择最佳答案。对话和问题都读两遍。
7. A. A policeman. B. A doctor. C. An astronaut.
8. A. Her clothes are out of style. B. She argued with her friend.
C. She was mad at her mother.
9. A. She was cutting her hair. B. She was walking along the street.
C. She was standing in front of the library.
