With time going by, we have come to realize that creativity is _______it takes to keep a nation highly competitive.
A．whatB．howC．whyD．that
A

試題分析：考查表語從句。本題what引導(dǎo)表語從句what it takes to keep a nation highly competitive.并在句中做takes的賓語。句意：隨著時間的流逝，我們逐漸意識到創(chuàng)造性是讓一個國家有競爭力需要的事情。故A正確。
點評：表語從句的考查主語是考查連接詞在句中的作用和充當(dāng)?shù)某煞帧?/div>
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