While a full understanding of what causes the disease may be several years away, ______leading to a successful treatment could c

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问题 While a full understanding of what causes the disease may be several years away, ______leading to a successful treatment could come much sooner.

选项 A、a distinction
B、a breakthrough
C、an identification
D、an interpretation

答案B

解析 本题考查名词辨析。a distinction意为“区别,差别;优秀,杰出”。a breakthrough意为“突破,突破性进展”。an identification意为“鉴定,验明;认同”。an interpretation意为“解释,说明;诠释”。根据空格后的a successful treatment可以判断,a breakthrough能使句意完整通顺,故为答案。
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