The 18th National Congress of the CPC has been one ofthings in our life recently.A. import

问题补充：

The 18th National Congress of the CPC has been one ofthings in our life recently.

A. important

B. more important

C. most important

D. the most important

答案：

A. important

B. more important

C. most important

(答案→)D. the most important

解析：句意：中共第18届全国代表大会是我们最近生活的最重要的事情之一。One of+the+形容词最高级，表示“最……之一”；故选D。