阅读理解。 Do you know what couch-potato means? Well, in America, the word is now often used. The American couch-potato becomes maybe even a part of the American tradition! You see, in America, many people often spend their free time sitting on a couch (沙发) watching TV. As there are many channels to choose, the TV can be quite interesting and very addictive (上瘾的). One may sit and watch TV for hour and hour without stop! Well, these people who do nothing all day except watching TV are called couch-potatoes. In America, when one watches TV, he is most often sitting on a couch. While watching TV, most of these people look so frozen that they almost look dead! Everyone is sitting still (静止的) with eyes looking right into the same black box. Also because these people are addictive to TV, they don't take exercise and usually get very fat. So in many ways, these people look like real potatoes! Well, because they look so still and fat, and watch TV on a couch, they are all called couch-potatoes. Now you know what couch-potato means. The next time if you see someone watching TV too long, just say, 'What a couch-potato!' 1. The word 'couch-potato' is often used in _____. [     ] A. China B. America C. Japan D. France 2. If a person is called a couch-potato, he or she _____. [     ] A. likes sitting on a couch watching TV B. does nothing all day C. must be very fat D. only watches TV and eats potatoes 3. Why does a couch-potato look like a real potato? Because he or she _____. [     ] A. almost never moves while watching TV and gets very fat B. is fat and dying and can not take exercise C. likes eating potatoes on a couch while watching TV D. is frozen in front of the black box 4. The passage mainly tells us _____. [     ] A. how to watch TV B. why couch-potatoes are very fat C. what couch-potato means D. where the new word is used 5. Which of the following should be the writer's suggestion (建议)? [     ] A. Take exercise. B. Never watch TV. C. Don't sit on a couch. D. Don't watch TV too much.