问题补充：
The reason he gave for not coming was his mother wouldn’t allow him to.
A. why ; that
B. for which ; that
C. why ; because
D. which; that
答案：
(答案→)A. why ; that
B. for which ; that
C. why ; because
D. which; 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，that引导表语从句，选A .
