When should you be even more careful than usual of the foods? During the ______.

During the summer you should be even more careful than usual of the foods you prepare. Foods spoil faster in hot weather than in cold weather.(12)When you are shopping, purchase frozen and refrigerated foods last. Don’t make long stops on the way home, because frozen foods could be soft or warm. Using insulated bags helps keep food cold until you can get home.(13)Milk and milk products should be refrigerated immediately.(14)When camping or picnicking, or at any time 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,(15)if a food doesn’t seem to be normal in smell or appearance, throw it away immediately. Don’t taste it.
Questions 11 to 15 are based on the passage you’ve just heard.
11. When should you be even more careful than usual of the foods?
12. What kinds of food should you purchase last when you are shopping?
13. After you get home, what kinds of food should be refrigerated immediately?
14. When camping or picnicking, what kinds of food shall we have?
15. According to the talk, what should you do with food that doesn’t seem to be normal?