A、Cookies. B、Milk. C、Chickens. D、Ice-cream. A题目询问以下哪种食物在温暖的天气最不容易变质。关键是听到细节“没有冰箱的话，用特别的dry food”，dry food指没有涂奶油之类的食品，可判断选项A(小甜饼)

During the summer you should be even more careful than usual of the food you prepare. Food spoils faster in hot weather than in cold weather. When you are shopping, purchase frozen and refrigerated foods at last. Don’t make long stops on the way home, because frozen foods could become soft or warm.  Using insulated bags helps keep food cold until you can get home. Milk and milk products should be refrigerated immediately. When camping or picnicking, or at any time [27]when refrigeration isn’t available, use special dry food. Don’t leave foods in a hot car or beach bag. Picnic favorites like meat, chicken, and egg salad should be kept in a cooler. Above all, if a food doesn’t seem to be normal in odor or appearance, [28]discard it immediately. Don’t taste it.