Scientists have achievedr a major in the search for a cure for cancer, is good news for those who suffer from cancer
A. breakthrough; what
B. breakdown; which
C. breakup; that
D. breakthrough; which
网友回答
A. breakthrough; what
B. breakdown; which
C. breakup; that
(答案→)D. breakthrough; which
解析： breakthrough 意思为 “突破”, a breakthrough in sth在某方面上的突破; which引导的非限制性定语从句, 指代前面句子的内容。