In spite of the city’s crowded urban environment, opportunities for outdoor are never lac

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A. reception
B. reservation
(答案→)C. recreation
D. regulation
解析：考察名词辨析。Reception接待，接收  reservation 预约，预定 recreation娱乐 regulation规则，规定
句意为尽管市区的环境很拥挤，但是户外娱乐的机会从来是不缺乏的。