问题补充：
I toured Zhangjiajie, 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
答案：
A. For the first time
B. At first
C. It was the first time
(答案→)D. The first time
解析：考查连词。本题的AB两项都是介词短语，在句中单独做时间状语，不能引导时间状语从句，C项是强调句型，缺少了that，而且与句意不相符。D项中的the first time第一次…的时候，是一个名词短语，引导起时间状语从句。句意：第一次我来浙江旅游的时候，我就对浙江美丽的景色留下了深刻的印象。故D正确。
