He was faced with the of whether or not to return to his country after he got the doctor's degree in America．
A. situation
B. circumstance
C. environment
D. dilemma
网友回答
A. situation
B. circumstance
C. environment
(答案→)D. dilemma
解析：考查名词：A． situation形势B． circumstance 环境C． environment环境D． dilemma窘境，两难境界，句意：他面临在美国获得博士学位后是否回国的两难境界。选D。