问题补充：
The doctor the crying baby but couldn’t find out what was wrong with it.
A. looked after
B. looked over
C. looked for
D. looked out
答案：
A. looked after
(答案→)B. looked over
C. looked for
D. looked out
解析：短语辨析。四个选项分别表示照顾、检查、寻找和向外看。根据题意医生检查了这个哭泣的男孩，但是不能找出他除了什么问题。故选B。
