They are so alike that you can't tell___ is which.A,what B,which选哪个 为什么?

问题描述:

They are so alike that you can't tell___ is which.A,what B,which选哪个 为什么?
但是如果选B的话那是什么从句呢?

B,which
他们长的太像了,你分辨不出哪个是哪个.
当然是tell 后边的宾语从句了.
.you can't tell (that) which is which.