Question

The reason ____he was late was ____he had taken a wrong bus.

A．why; because

B．for; because

C．why; that

D．for; that

Answer 1

C

試題分析：考查定語從句和表語從句。本題使用的是固定句型The reason why...is that...“......的原因是......”。從句he was late不缺成分，先行詞是the reason，因此，定語從句用why引導(dǎo)，for不能引導(dǎo)定語從句，排除B、D；was后跟從句作表語，從句he had taken a wrong bus是主謂賓結(jié)構(gòu)，不缺成分，用that只起引導(dǎo)作用，排除A；故選C。