单选题 I shall never forget the look of intense {{U}}anguish{{/U}} on the face of his parents when they heard the news.

【正确答案】 C

【答案解析】[解析] anguish“痛苦”，四个选项：stress“压力”；dilemma“困境”；misery“痛苦，不幸”；surprise“惊奇”；所以C项符合题意。