问题补充:
The reason he could not go there was his grades were too low.
A. why ; because
B. that; because
C. why; that
D. that; that
答案:
A. why ; because
B. that; because
(答案→)C. why; that
D. that; that
解析:考查名词性从句。The reason why … is / was that …,……的原因是……。Why引导定语从句,先行词reason在从句中作原因状语,that引导表语从句。故选C。