He listened hard but still couldn't ______ what they were talking about.[2010]
【正确答案】 D
【答案解析】解析：动词短语含义辨析题。A项make over“转让，移交”；B项make up“虚构；化妆；组成；偿还”；C项make upon不是固定词组；只有D项make out有“勉强听／看／认出来”的意思，是正确答案。