【题目】At present，we have come to sense that creativity is _____ it takes to keep a nation highly competitive．
A．what B．why
C．how D．that
在线课程【答案】A
【解析】
试题分析：考查表语从句。本题what引导表语从句what it takes to keep a nation highly competitive.并在句中做takes的宾语。句意：现在，我们逐渐意识到创造性是让一个国家保持高度竞争力的东西。故A正确。
【名师点评】表语从句的考查主语是考查连接词在句中的作用和充当的成分。