OnedayMrsWilsonwentshoppingwithTracyandBen.Theytothesup...
问题详情：OnedayMrsWilsonwentshoppingwithTracyandBen.Theytothesupermarketinthenewshoppingcentre.“Whydoyoubuythingshere?”Tracywantedtoknow.“Becausetheyarecheaperherethanatthecornerstorenearouthome.”M...