The experienced climber was________ the potential danger in such extreme weather and decided to wait until the following day.
A ． completely blind to B ． totally lost in
C ． pretty keen on D ． well aware of
D
【详解】考查形容词短语辨析。句意：有经验的登山者充分意识到在这样极端天气下存在的潜在风险，决定等到第二天。 A. completely blind to 完全不了解； B. totally lost in 完全迷失于； C. pretty keen on 非常喜欢； D. well aware of 充分意识到。分析句子结构可知，此处应为形容词短语作表语，选项均为副词修饰形容词，结合句意可知，此处表示 “ 充分意识到 ” ，故 well aware of 符合句意。故选 D 项。
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