can tell

从她的表情，我能看出她很不高兴。

I ___can ___tell that she is upset from her expression.

即使是在电话里，我也能听出母亲什么时候在担心。

Even over the phone, I ___can ___tell when my mother is worried.

据说这面镜子能辨别是非。

It is said that this mirror ___can ___tell right from wrong.