He has promised to _________ the matter and will give the workers a satisfactory answer.A.look intoB.look afterC.look atD.look for
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A解析试题分析：短语辨析。A调查B照顾C看D寻找；句意：他答应调查这起事故，并给工人们一个满意的答复。根据句意说明A正确。考点：考查短语辨析
点评：本题考查了look的短语。Look into…调查；是考查的重点。Look after=take care of照顾；对于一些意思相近的短语要多加辨析。