---It’ s getting dark. Has Mr. Johnson finished his house?---I have no idea,but this morning he was painting it.A.to paintB.paintingC.having paintedD.to have painted
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B解析考查短语：finish doing sth完成做某事，句意：天快黑了，Mr. Johnson完成粉刷房子了吗？我也不清楚，但是今天上午他正在粉刷。故选B。