— Have you been here before?
— Yes. This is the third time that I to Shanghai.
A. e
B. came
C. have e
D. had e
网友回答
A. e
B. came
(答案→)C. have e
D. had e
解析：考察固定句式中的时态。固定句式：It /That/This is the...time that sb have done sth；It /That/This was the...time that sb had done sth。“这是某人第几次做某事的时候了”；结合日常生活实际，能够计算到这是第几次做某事，表明该动作已经发生，因此，要用完成时态——主句用现在时，从句用现在完成时；主句用过去时，从句用过去完成时。本句前面使用了is。说明后面使用的是现在完成时。故C正确。