Tell me the difference between using words: goal,aim,purpose. Please=)

Would you mind helping me with the grannar test? Could you choose the correct anwer and write some text about why this variant is correct, please? 1 i came to the theatre but they already sold/already had sold/had already sold/had already selled all the tickets 2 i went to london for buy/ to buy/ for to buy/for buying some clothes 3 i have begun/ begun/ have began/began my new job last month 4 Jane had trouble with her job at first-Yes.She used to/usedn't to/got used to/wasn't used to/ didn't used working on her own. 5 Did you speal to Kate on the phone last night? - Yes, but I am trying/was trying/have been trying/had been trying for ages before I finally got through. Thank you, very much.

Plz help me with speaking How i should end a phrase 'and etc." or "and stuff"?

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hello. I am Russian native speaker. Feel free to contact me if u need help with Russian. It would be great if u could help me with English. 

Hello!

I am Russian antive speaker. Feel free to contacm me if u need help with Russian. 

Привет, помогу вам в изучении русского!

First notebook entry: Introducing myself Hello,I am an aviation engineer from Russia. I'm 25. I live in Moscow and want to improve my english communication skills. My hobbies are computers and strong trainings. I want to immigrate in USA or Canada, so i need to imrove spoken english and my grammar.