问题补充：
It is not just the size of the Olympic Games makes them unique, but they mean to us .
A. which, that
B. that, what
C. that, because
D. that, that
答案：
A. which, that
(答案→)B. that, what
C. that, because
D. that, that
解析：考察强调句型和主语从句。本句第一空使用that与it is构成强调句型。强调句型的基本结构为It is/was被强调成分that/who其它成分；其最大的特点就是去掉it is/was…that/who…句子仍然成立。要注意强调句型能强调除谓语动词以为的所有的句子成分。在考查的时候，经常会把强调句型和定语从句结合在一起考查，要注意分析句子的成分。第二空的what引导主语从句what they mean to us与前面的not是并列结构。句意：不是奥运会的规模大小而是奥运会的意义让它独一无二。故B正确。
