---It is said that China has been a member of WTO since December 11, 2001.
---Well, it’s wonderful that the Chinese people have made so much progress these years.
A. must
B. can
C. should
D. may
网友回答
(答案→)A. must
B. can
C. should
D. may
解析：考查虚拟语气。句意：据说中国自从2001年十二月十一日以来就成为世贸组织的成员。——嗯，太棒了。中国这些年来肯定取得了巨大的进步。表示对过去事情的肯定推测用“must+have+done”，译成“一定做过某事”，该结构只用于肯定句。故选A。原答案有误。