What an unforgettable experience! I’ll write it down it is still fresh in my memory.A. si

问题补充：

What an unforgettable experience! I’ll write it down it is still fresh in my memory.

A. since

B. after

C. while

D. until

答案：

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。