The reason_______he made such kind of mistakes is that he has had no _______ experience of this kind of job
A.whether; previous
B.which; before
C.why; previous
D.that; before
网友回答
C解析考查定语从句及形容词。句中先行词为the reason，在定语从句中作原因状语，故用关系副词why；previous为“以前的”，根据句意选C。