After you have used the dictionary，please just put it backit belongsA. to whomB. to which

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A. to whom
B. to which
C. what
(答案→)D. where
解析：考查地点状语从句。句意：你用完了字典之后，请把它放在它属于的地方。where it belongs作地点状语，修饰put it back，故选D。