Is this the first time you ___Beijing?A.have visited C.visited 为什么选A?

问题描述:

Is this the first time you ___Beijing?A.have visited C.visited 为什么选A?

这是一个固定句型,it is the first time(that)sb have done sth 这是某人第一次做什么事情,没啥理由,就是特定句型……