几道英语问题,请说清楚为什么.

题目

几道英语问题,请说清楚为什么.
1.--What was the party like
-- Wonderful .It's years ________ I enjoyed myself so much.
A.after B.before C.when D.since
为什么?不能选B吗?
2.-- It's a long time since I saw my aunt last time.
-- __________.
A.So it is B.So do you C.So I am D.So were you

答案

D...It has been years since I enjoyed my self so much.从我上次这么的尽兴之后好多年了（都没有玩这么的这个尽兴了.）
注意用的是 enjoyed ...是说过去.不是这一次..
A...
因为是 It is ...