【题目】With time going by, we have come to realize that creativity is _________ it takes to keep a nation highly competitive.
A. what B. how
C. which D. that
在线课程【答案】A
【解析】
考查表语从句。
句意：随着时间的流逝，我们逐渐意识到创造性是让一个国家有竞争力需要的事情。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。故选A。