语法与词汇 While a full understanding of what causes the disease may be several years away, _____ leading to a successfultreatment could come much sooner.

【正确答案】 B

【答案解析】句意：虽然对导致这种疾病的原因的全面了解可能还需要几年时间，但可能会更早取得成功治疗的突破。