He was unhappy when he sold his guitar. After all, he it for a long time..A. had hadB. h

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(答案→)A. had had
B. has had
C. has
D. had
解析：句意：当卖掉吉他的时候，他很不高兴，毕竟，他拥有它很长时间了。从句意看，拥有吉他很长时间是在卖之前的动作，所以是过去的过去，用过去完成时，所以选A。