After retirement, Mr. Mike drawing, which he had always loved but had not had time for. A

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A. took up
B. got up
C. help up
D. looked up
解析：     句意：退休后，迈克先生开始绘画了，这是他从前喜爱，却又没有时间做的事情。take up 开始花时间从事（某项活动）；get up起床，起立; hold up推迟；look up查找、改善。