问题补充:
—Do you know the most ancient city in China—Xi’an well?
—No,this is the first time I here.
A. came
B. have come
C. am coming
D. come
答案:
A. came
(答案→)B. have come
C. am coming
D. come
解析:考查时态。It is the first/second…time sb. that某人第几次做某事,从句用现在完成时候,选B。