语法与词汇 While a full understanding of what causes the disease may be several years away, _____ leading to a successful treatment could come much sooner.无
【正确答案】 D
【答案解析】句意： 虽然完全了解这个病的成因还要等几年， 但想要对成功治疗作出解释想必会很快了。interpretation阐释。 distinction不同。 breakthrough突破。 identification鉴定。 因此选D。