问题
选择题
The reason _____ he explained is ___ she was ill.
A.that , that
B.which , that
C.why,because
D.why, that
答案
答案:A
考查定语从句和表语从句。第一空是定语从句,先行词为The reason,从句he explained后缺少宾语,所以用关系代词which/that,第二空是表语从句,that 无词义,起引导作用。所以选A。