问题补充：
May 12th， is a special day，, I think，that will be remembered by the Chinese forever.
A. one
B. it
C. which
D. that
答案：
(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.
