B. Listen to the dialogue and choose the best answer to the question you hear（根据你听到的对话和问题，选出最恰当的答案）（8分）
7. A. The mother and her son.
B. The teacher and her student.
C. The doctor and her patient.
D. The shop assistant and her customer.
8. A. 6:00. B.6:30. C.7:00. D. 7:30.
9. A. Every week. B. Once a month.
C. Every day. D. Twice a week.
10. A. In the hospital. B. In the restaurant.
C. In the office. D. In the library.
11. A. By car. B. By taxi. C. By underground. D. By bus.
