What do you think of the reasons he explained at the meeting reducing the price?
A. why；why
B. that；for which
C. that；for
D. which；why
网友回答
A. why；why
B. that；for which
(答案→)C. that；for
D. which；why
解析：分析reason后的定语从句可以看出，定语从句中的谓语动词explained缺少宾语，因此第一空应该填that或which。第二空的介词for表示“……的理由或原因”。故选C项。