---Hi! Long time no see.
---Yes. It’s almost three years we met last time.
A. while
B. before
C. since
D. until
网友回答
A. while
B. before
(答案→)C. since
D. until
解析：根据题干，本句的意思是“自从上次见面，几乎有三年时间了。”“自从”是since。而while“当……时候”，before“在……之前”，until“直到……才”。所以本题选C。