这个题用IF还是AS？

——I'm going to the post office
——____you're there ,can you get me some stamps?
A AS
B Which
C Because
D if

选哪个，为什么啊？

as if 怎么用？ as if 什么时候用虚拟 as if it 后应是were还是was? as...as if用法 一道英语题，"as if" as if 作虚拟语气怎么用？ as if ,as ,if 的区别 as if,seem as区别 用since,as,when,as soon as,while,if,after,before,until或because 填空. as if 的用法