You look very tired and you must have been preparing for the coming examination yesterday evening, _________ you ?

— Peter, you feed the gold fish and the two little tortoises, ______?　— I did it in the morning; it’s a routine for me now．

You must have been caught in the traffic jam yesterday, ______you?

I can’t believe that anyone else in the school can swim as fast as you, 　　　　?

—— ______ TV do you watch every day?——About two hours.