What an unforgettable experience! I’ll write it down it is still fresh in my memory.
A. since
B. after
C. while
D. until
网友回答
A. since
B. after
(答案→)C. while
D. until
解析：考查连词，since 自从，after 在什么之后，while 当什么时候，until直到，句意：多么一次令人难忘的经历呀！趁着在我还记忆犹新我将把它写下来。所以选C。