Doctors are often caught in a ______ because they have to decide whether they should tell their patients the truth or not.
 
【正确答案】 C
【答案解析】 in a dilemma为固定搭配,意为“处于(进退两难的)困境”;in a puzzle也是固定搭配,意为“困惑,迷惑”,不符句意;perplexity“困惑,茫然”;bewilderment“迷惑,昏乱”,无此搭配。故答案为C。