问题补充：
—good time we had at the party last night!
— Yes． It was exciting party that I would never forget it．
A. What; so
B. How; such
C. What a; such an
D. How a; so an
答案：
A. What; so
B. How; such
(答案→)C. What a; such an
D. How a; so an
解析：句意：我们昨天晚上在晚会上玩的是多么开心呀！是的，它是如此的令人兴奋以至于我永远不会忘记它。第一句为感叹句，是对have a good time表示感叹，time为名词，所以用what来引导，第二句考查so+adj+a/an+n+that...或者such+a/an+adj+n.+that句型结构，表示“如此...的一个东西....以至于”，或者可以用so exciting a party也是可以的，故选C。
