我听不出他们的口音有什么区别。

I can't ___tell ___the ___difference between their accents.

这种咖啡的价格大约是那种的一半，但你确实尝不出区别。

This coffee is about half the price of that one and yet you really can't ___tell ___the ___difference.

不仅他们的批判意识会萎缩，而且他们将无法区分对与错。

Not only will their critical sense atrophy but also they will not be able to ___tell ___the ___difference between what is right and wrong.