一、听力测试（本题有2节，共20分）
第一节（本节有5小题，每小题1分，共5分）
请听下面5段对话, 选出最佳选项，每段对话仅读一遍。
1. What can we learn from the conversation?
A. This is the woman’s second time to see Mr. White.
B. The woman wants Mr. White to check her teeth.
C. The man is a good dentist.
2. What does the woman ask the man to do?
A. Change the channel. B. Turn the music up. C. Turn the music down.
