Что вставить? •Everybody knows you already, ... ? a) don't they b) do they c) isn't it...

Question

Что вставить?
•Everybody knows you already, ... ?
a) don't they
b) do they
c) isn't it
d) aren't they

Answer 1

Everybody knows you already, don't they?
answer is a)

Answer 2

a) don't they 
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