---It’s a long time we last met. How is everything going?
---Well, I am living a happy life.
A. when
B. since
C. after
D. while
网友回答
A. when
(答案→)B. since
C. after
D. while
解析：A. when 当…时候，何时 B. since自从 C. after在…之后 D. while当…时候；句意：自从我们上一次见面有很长时间了。最近怎么样？我过的很开心啊！