【题目】—Do you know the most ancient city in China—Xi'an well?
—No, this is the first time I ________ here.
A.had come
B.am coming
C.have come
D.came

【答案】C
【解析】句意：---你对中国最古老的城市——西安了解的多吗？---不，这是我第一次来这儿。It/This/That be the first/second time that sb.+完成时，表示“某人第几次做某事”，根据主句用现在时，故从句用现在完成时候，选C。