问题
选择题
_______ is even important is ______ as the earth cooled down, water began to appear on its surface.
A．That, that
B．What, that
C．What, what
D．It, that
答案
答案：B
题目分析：考查名词性从句：句意：甚至更重要的是，随着地球冷却下来，水开始出现在它的表面。第一空是what引导的主语从句，what在主语从句中做主语，第二空是that，连接表语从句，因为表语从句是完整的，不缺成分，选B。