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【题目】The _____ population may be the greatest challenge of the world today.

A. increaseB. increasedC. increasingD. increases

【答案】C

【解析】

句意:不断增长的人口可能是当今世界最大的挑战。

本词修饰名词population可知填形容词;increase:增加,动词,三单形式是increasesincreasedincrease的过去式,也可做形容词讲,意思是“增强的,增加的”,指已经发生了的;increasing意思是“正在增加的,不断增长的”,形容词。本句指“正在增长的”人口,可知选C。

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