Can you ___the difference between them?为什么答案是tell,say不行呢

Can you ___the difference between them?为什么答案是tell,say不行呢
Can you ___the difference between them?为什么答案是tell,say不行呢

Can you ___the difference between them?为什么答案是tell,say不行呢
tell在这里有判断、分辨的意思,say没有.
Can you tell后面跟一个需要判断的事情,这是固定用法.

这是固定用法，记住就行了，真的没道理。

,So explain the difference as clearly as you can .Let me satisflied and then I will give U mark , What are you working for? means now