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1)you have never been to Moscow - True. I'm only planning to visit Moscow next year.
2)your best friends has already finished this test. - False. My best friend didn't pass this test at all.
3)you haven't seen your English teacher yet. - False. If i have never seen him, I wouldn't have to pass this test.
4)you have never swum in the sea - False. I like swimming in the sea very much. It's a lot of fun!