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:考查固定句型。This/It is the first time +从句从句中应用现在完成时。故答案为B。