听下面5段对话或独白。每段对话或独白后有几道小题，从题是所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有5秒钟的时间阅读各个小题；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
听第6段材料，回答第6、7题。 Why did the men call Dr. Williams
[A] To ask him to come back earlier. B. To tell him about the pain treatment. C. To get a treatment for the woman.