单项选择题

Directions: In this section, you will hear 6 short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be read only once. After each question, there will be a pause. During the pause, you must read the three choices marked A, B and C, and decide which is the best answer.

A. A student and his classmate.
B. A teacher and his student.
C. A librarian and a student.