But water, nature’s most essential element, is becoming increasingly______.A、bar

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问题 But water, nature’s most essential element, is becoming increasingly______.

选项 A、barren
B、absent
C、critical
D、scarce

答案 D

解析形容词辨析题。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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Butwater,nature’smostessentialelement,isbecomingincreasingly______.A、bar