题目内容：
What is the speaker' s main topic?
A．Training for a professional athlete． B．His physical training．
C．How to do cross-country running．
D．How to do mountain climbing．
参考答案：
答案解析：
单选题：What is the speaker' s main topic?
- 题目分类：公共英语三级
- 题目类型：单选题
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B．His physical training．
C．How to do cross-country running．
D．How to do mountain climbing．