when did you come here?____since we landed here.

问题描述:

when did you come here?____since we landed here.
A.it has been two days B.it was two days 选什么?为什么?
为什么?

A (It is/ has been +一段时间+since +从句(过去时).固定句型‘自从……以来,……了’)自从我们登陆这里已经两天了.