Question

The reason       I have to go is        my mother is ill in bed.

A．why...why	B．why...because
C．that...because	D．why...that

Answer 1

D

试题分析：考查定语从句和表语从句：句意：我不得不走了的原因是我母亲生病在床。the reason后面跟一个定语（从句），The reason is that my mother is ill in bed. 用why引导定语从句，第二空是表语从句的连接词：原因是什么？是一个事实，这个事实用that引导，选D。