一道关于虚拟语气的英语选择题

问题描述:

一道关于虚拟语气的英语选择题
If I had worked harder at school,I _____ in a comfortable office now.
A.would sit B.would have sit C.would be sitting D.were sitting

c
这个是错综时间条件句,主句对现在虚拟,用would inf..当然,这里有进行的意味,所以选c