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But water natures most essential element is becoming increasingly______.A.barrenB.absent

But water, natures most essential element, is becoming increasingly______.

A.barren

B.absent

C.critical

D.scarce

请帮忙给出正确答案和分析,谢谢!

参考答案

正确答案:D
形容词辨析题。scarce意为“缺乏的,罕见的”,符合句意,故为答案。barren意为“贫瘠的;不生育的;无益的;空洞的”;absent意为“缺席的;缺少的;心不在焉的”;critical意为“批评的,爱挑剔的;危险的;决定性的”。

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