语法与词汇
While a full understanding of what causes the disease may be several years away, _____ leadingto a successful treatment could come much sooner.
【正确答案】
B
【答案解析】句意：虽然对疾病的原因的充分了解还可能需要几年的时间，但是一个能够发现成功治疗方法的突破可能更快来临。breakthrough突破。distinction区别，荣誉，特质，卓越。identification认同，鉴定。interpretation理解，解释。