С. много . нужно дописать хвостики . 1you study a lot of subjects, ? 2you can play a musical instrument, 3you don't speak french, 4you began to study english 4 years 5your teachers aren't british, 6you weren't in london this summer, 7all your friends would like to visit

Имеются в виду эти хвостики?

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?