I went to Guiling I was fascinated by its natural scenery.A. The first timeB. At firstC. A

问题补充：

I went to Guiling,I was fascinated by its natural scenery.

A. The first time

B. At first

C. At the first time

D. For the first time

答案：

(答案→)A. The first time

B. At first

C. At the first time

D. For the first time

解析：考查连词。在英语中很多名词性短语都会转化成连词，连接时间状语从句，如the first time, the second, the moment等；本题中的the first time第一次…的时候；连接时间状语从句I went to Guiling；句意：第一次我到桂林的时候，就被它自然的景色给迷住考查连词了。故A正确。