The reason he was late was he had taken a wrong bus.
A. why; because
B. for; because
C. why; that
D. for; that
网友回答
A. why; because
B. for; because
(答案→)C. why; that
D. for; that
解析:考查定语从句和表语从句。本题使用的是固定句型The reason why...is that...“......的原因是......”。从句he was late不缺成分,先行词是the reason,因此,定语从句用why引导,for不能引导定语从句,排除B、D;was后跟从句作表语,从句he had taken a wrong bus是主谓宾结构,不缺成分,用that只起引导作用,排除A;故选C。