5.16.Which store is having the great sale? A.Hualian. B.Huaxing. C.Huayu. 17.How much is a sweater? A.10 yuan. B.30 yuan. C.80 yuan. 18.How much should Dandan pay if she wants to buy a skirt? A.90 yuan. B.70 yuan. C.60 yuan. 19.What is on sale for old people? A.T-shirts. B.Jackets. C.Sports shoes. 20.How many days will the great sale last? A.One day. B.Two days. C.Three days.