Sally her MP4 for 3 years.A. have boughtB. has boughtC. have hadD. has had

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A. have bought
B. has bought
C. have had
(答案→)D. has had
解析：D 考查现在完成时。与一段时间连用时，短暂动词必须转换为延续性动词或状态性动词。buy转换为have“有”，故选D。