[解析]
BAA
M:Mom,I'm hungry.
W:What do you want to eat?
M:A beef hamburger and some potato chips.
W:No hamburgers.No potato chips.They're not good for your health.
M:Mom…only once,OK?
W:OK.You can have the unhealthy food only once a month.
M:Where should we go then?
W:How about KFC?
M:There are always too many people.We have to wait for long.
W:Maybe we can order food from the Internet.Then we can enjoy the food at home.
M:That sounds cool!