Some environmentalists are dubious of the statement that the air quality in this city has ______ since 2000.

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问题 Some environmentalists are dubious of the statement that the air quality in this city has ______ since 2000.

选项 A、decreed
B、defaulted
C、deteriorated
D、degraded

答案C

解析 一些环境学家对该城市自2000年来空气质量一直恶化这一说法表示怀疑。A. decreed“颁布,命令” B.defaulted“违约,缺席,拖欠”C.deteriorated“恶化,变坏” D.degraded“退化,降级”
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