"Between" is used only for two things: between you and me Jenny and Sam had only three dollars between them. "Among/between these three sentences, which (which ONE??) is correct ? I would not use either; I would say: One of the three following sentences is correct. Which one? And "The talks among/between the countries are making not progress" 1 - depends on how many countries you are talking about The talks between China and the US are not going well. The talks among the EU nations regarding refugees.... 2 - talks don't make progress (people make progress). See first sentence in 1 as an alternative 3) Do you say "I can quite whenever I want or I want TO?. I can QUIT.... both are fine.

The talks between the countries are making no progress What have you got? : I have 20 inches I can quit whenever I want. I can quit whenever I want to.