what do you think of the reason.

题目

what do you think of the reason.
what do you think of the reason____ he explained in his last letter ____ refusing the job?
A.why:for B.that:for which C.which:for D.that:because

答案

第一个空引导定语从句,先行词是reason,在从句中作宾语,用which引导,第二个空是the reason for refusing the job,拒绝工作的原因,固定搭配
你怎么看待他所解释的关于拒绝那份工作的原因