Theauthoritieswill____thecasefurtherbeforetheycancometoaconclusionaboutit.
A.look outB.look upC.look throughD.look into在线课程D
考查短语辨析。look out当心，look up 查字典， look through浏览，look into 调查，句意：官方人员在得出结论之前他们将进一步调查这个案件。故选D。