_____ I toured Zhang Jiajie, I was deeply impressed with its beautiful scenery.
A. For the first time B. At first
C. It was the first time D. The first time
_____ I toured Zhang Jiajie, I was deeply impressed with its beautiful scenery.
A. For the first time B. At first
C. It was the first time D. The first time
D
the first time作连词，引导时间状语从句。