It was not just the size of the party last night made it unique, but it meant to our sch

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A. what; that
B. that; what
C. what; what
(答案→)D. that; that
解析：第一空为强调句型其构成是：It is (was) + 被强调部分+ that (who) + 句子其他部分；第二空为主语从句that只起连接作用不做成分。句意：不是昨晚聚会的规模而是聚会对我们学校的意义使得聚会独特。