200分

200分
-Is it ____ that you _____ the city?
-No.Once a year at least.
A.for the first time;visit B.the first time;visit
C.for the first time;visited D.the first time;have visited.
还原D：It is the first time you have visited the city.
还原A：It is for the first time you visit the city.好像也没问题.
为什么不选A?
讲强调句时的一个例句：
It is from the sun that we get light and heat.
那我说：
It is for the first time that you visit the city.怎么不对?
第八届“21世纪—爱立信杯”全国大学生英语演讲比赛中张勇演讲的时候说的一句话：
For the first time in my life,I was moved.
如果改成强调句就是：
It is for the first time in my life that I was moved.
这到底哪里不对.