参考答案

正确答案：C
解析：[听力原文]
M: Bob never seems to be cheerful when I meet him. What's wrong with him?
W: That's because he is not content with his work life and children.
Q: What kind of person is Bob?
由选项可知问题是关于“他”。男士说不管什么时候见Bob，他都不太高兴。女士说那是因为他对工作，生活和孩子都不满意。因此可知Bob总是抱怨。故正确答案为C)。