问题补充:
The reasonhe 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
答案:
A. whether; previous
B. which; before
(答案→)C. why; previous
D. that; before
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。