单选题 From the time of the Greeks to the Great War, medicine' s job was simple: to struggle with ______ diseases and gross disabilities, to ensure live births, and to manage pain. A. immortal B. immune C lethal D. toxic

【正确答案】 C

【答案解析】[解析] C项“lethal致命的”，如Pot-holes can be lethal for the unwary cyclist(路上坑坑洼洼，骑车的人一不小心就有致命危险)，根据空格处的意思：与致命的疾病做斗争，故选C。A项immortal不朽的；B项immune免疫的；D项toxic有毒的，均不符合题意。