1 --In Japan, the process by which the prime minister can excuse the House of Representatives and trigger a general election is called?

2 -- How did Marx envision communism in its final form?
3 --from the states' point of view, what advantage did revenue sharing have over federal grants-in-aid programs?
4 -- Dictatorships have what type of party system?

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I'm really not sure about these question answers...for the first one I'm guessing that it is called perestroika, and the last one is an oligarchy, but I'm not sure at all for any of them.

Please help asap! Thank you very much!

Perestroika is not the answer for your first question. Perestroika is a Russian word meaning economic reforms instituted in the 1990s in Russia.

Dictatorships do not have an oligarchy -- which is described in this site.

http://www.historyforkids.org/learn/government/oligarchy.htm

Please check your book for the answers to these questions. We'll be glad to critique your answers then.