The reason so many people rushed to California was another gold mine was found in California.
A. that; because
B. why; that
C. that; why
D. why; because
网友回答
A. that; because
(答案→)B. why; that
C. that; why
D. why; because
解析：考查句型：the reason why … is that, …的原因是，第一个空为why引导的定语从句，第二个空为that引导的表语从句。故选B。