1You study a lot of subjects, don't you ?
2You can play a musical instrument, can't you?
3You don't speak French, do you?
4You began to study English 4 years ago, didn't you?
5Your teachers aren't British, are they?
6You weren't in London this summer, were you?
7All your friends would like to visit Britain, wouldn't you?

 Перевод,и объяснение почему вставлено don't  и все остальные.
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