cau 1 : tag question ( câu hỏi đuôi ) 1 prices keep going up ......... ? 2 you’d been there before .......? 3 you’d like a drink .......... ? 4 the boys prefer a cooked breakfast .............? 5 the smiths need two cars...........? 6 he used to eat raw fish .......? 7 you’d better wait for bill..............? 8 you’d come if i needed help .............? 9 you could come at short noice ........? 10 it never works very well............? 11 mary hardly ever cooks ...........? 12 she’d save money if she bought fresh food ...................? 13 there used to be trees here ............? 14 mr. smith usually remembered his wife’s birthdays .............? 15 he hardly ever leaves the house ..................?