It is the first time I to visit the Great Wall. A. cameB. comeC. have come D. had come

问题补充：

It is the first time I to visit the Great Wall.

A. came

B. come

C. have come

D. had come

答案：

A. came

B. come

(答案→)C. have come

D. had come

解析：考察固定句型，It+be+the first time+that从句，that后面的时态取决于be动词，如果是is，后面的时态就用现在完成时，如果是was，后面的时态就用过去完成时，所以选C