____scientists have observed increased pollution in the water supply.A、LateB、La

游客2025-04-13  1

问题 ____scientists have observed increased pollution in the water supply.

选项 A、Late
B、Later
C、Latter
D、Lately

答案 D

解析 A项"Late"形容词,表示“迟的,迟到的”;B项"Later"是副词,表示“后来,以后”;C项"Latter"为形容词,表示“后面的”;D项"Lately"是副词,表示“最近”,根据题句中所用的现在完成时结构,可知D项为正确答案。
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