— bargaining is so interesting?
—Sometimes it is a test to see who stand their ground for the longest.
A. What is it that
B. Why is it that
C. What it is that
D. Why it is that
网友回答
A. What is it that
(答案→)B. Why is it that
C. What it is that
D. Why it is that
解析：考查强调句的特殊问句：句意：为什么讨价还价这么有趣？--有时是考验看谁坚持到最后。强调句的特殊问句的结构是：疑问词+is/was+that+其余部分，这句话其余部分并不缺主语，宾语和表语，不能用what，排除AC项，因为是疑问句，所以语序是is it，选B。