问题补充：
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
答案：
A. For the first time
B. At first
C. It was the first time
(答案→)D. The first time
解析：本题中国四个选项看，句意应用：我第一次游览张家界时，就对它的美丽的风景印象深刻。句中用逗号，但有两个主语，谓语。故只能用连词链接，而只有D可以直接作连词用。C中应加上that，并且时态改为过去完成时。故选D
