1) the flat they bought was vary expensive___ a)is it b) isn't it c)wasn't it d) was it 2) You don't ike hamburgers.

1) The flat they bought was very expensive, wasn\'t it? 2) You don\'t like hamburgers, do you? 3) You are going to France next week, aren\'t you? 4) Last night we had a good time, didn\'t we? 5) It\'s not hot today, is it?

Если в основной части разделительного вопроса (до запятой) есть отрицательная частица \"not\"/\"n\'t\", тогда в \"хвостике\" (после запятой) эта частица отсутствует, и наоборот.