问题
选择题
---Have you ever been here before?
---No. this is the first time that I to the Great Wall.
A comes B have been C came D had been
答案
：B
：考查特殊句型用法。句式：It/this is the first time后面的从句使用现在完成时。如果前面是was,后面要使用过去完成时。故B正确。