He volunteered to work in a remote mountainous village in West China last year, which is s

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A. available
B. acceptable
C. admirable
(答案→)D. accessible
解析：考查形容词：A. available可获得的B. acceptable可接受的C. admirable令人敬佩的D. accessible易接近的，可到达的，句意：去年他自愿到中国的偏远山区工作，那里只有步行可以到达。选D。