This is the third time I Beijing. The second time I here was on Christmas Day last year.

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(答案→)A. have visited; came
B. have visited; have e
C. visited; came
D. visited; have e
解析：考查句型：This is the third time后跟从句用现在完成时态，The second time为连词，根据时间last year，应用过去式，所以选A，句意：这是我第三次参观北京了。第二次我来的时候是去年的圣诞节。所以选A。