It has been found that even people insensitive to a certain smell______can sudde

游客2025-03-10 5

问题 It has been found that even people insensitive to a certain smell______can suddenly become sensitive to it when exposed to it often enough.

选项 A、at large
B、at last
C、at least
D、at first

答案 D

解析本题考查at的短语辨析。at large意为“详细地”；at last意为“最终，最后”；at least意为“至少”；at first意为“首先，最初”。根据句意，应选D。

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