May 12th，2008 is a special day， , I think，that will be remembered by the Chinese forever.
A. one
B. it
C. which
D. that
网友回答
(答案→)A. one
B. it
C. which
D. that
解析：主要测试同位语。one that will be remembered by the Chinese forever.是同位语。I think 是插入语。one = a day.