语法与词汇 21.He was a scientist who claimed to have a miracle cure and was then______as a charlatan.
【正确答案】 B
【答案解析】这句话的意思是:他是个声称有神奇疗法的科学家,后来被揭露出是个骗子。expose意为“揭露、揭穿、揭发”;impose意为“把……强加于”;remove意为“移开、走、拿去”;renew意为“更换、把……更新”。根据句意,选项B为正确答案。