In order to find out how the famous painting was stolen as soon as possible, more experienced policemen have been sent to _____ the case.A.look forB.look upC.look intoD.look through
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C解析考查短语辨析，look for寻找，look up查字典， look into调查，look through浏览，根据句意更多有经验的警察被派出去调查这个案件。故选C。