The students gave a quick answer to the question they did it, was raised by the foreign visitors.
A. which;which
B. why;which
C. why;that
D. that;that
网友回答
A. which;which
(答案→)B. why;which
C. why;that
D. that;that
解析：第一个从句是同位语从句，应用 why引导，因为why从句是说明 question的内容的。第二个空选用which的主要原因是这是一个非限定性定语从句。