I believe "peoples" refers to a few or several groups of diverse populations of people. That is why it is plural.

To donate is to give something to a cause or a group, auch as money or your time. To contribute is more to join in, such as contributing to a conversation by stating your thoughts or more information. You can also use contribute to support a cause, but you wouldn't say you donate your opinion. It's a tricky difference, but I hope this helps!

"Left" would signify something that happened in the past, and would be understood as something the speaker didn't intend to do! Using "have left" could signify something just done on purpose. Such as " I have left my wallet at home so I won:t lose it." It would also usually be said just after having done it with the intention, in this case, of not losing it. This is hard to explain but I hope it helps.

Usually this is used in a sentence, such as "we experienced a language barrier but managed to resolve the problem." This phrase means that the two people in the conversation speak different languages or don't speak each other's language well enough to have an easily understandable conversation. A barrier is like an invisible wall, in this case, between the two people ( although the word barrier is also used to mean a literal wall or something else which creates division between people, objects, etc.) I hope this helps you!

They are not the same thing. "How would you like the steak" Well-done, means cooked thoroughly. "How DID you like the play?" It was very good. It was a good play. By saying "How WOULD you like the play?" it is as if the person you are asking can affect the outcome of the play, whether it is good or bad, which he cannot do. ' Well' is an adverb. "Good is an adjective. The man is a GOOD singer. He sang very WELL. I hope this helps!

Dramatic generally refers to a serious situation. In some cases, a person will accuse someone else of being dramatic, or overly dramatic, if the person thinks the situation doesn't warrant such intense reaction. In this situation, Gale thinks that Dr. Hank is being overly serious about the situation.

This sounds like a title, as it is not a complete sentence? I will assume that is the case. Privatization in Poland and the Czech Republic during the 1989 - 1998 economic transformation.