My cousin Mark is much healthier now. But he used to have some bad habits. For one thing, he was a couch potato. He is one of those overweigh people who sit on a sofa and eat junk food while they watch TV. He used to watch TV for six or seven hours some days. Now, he never watches TV for more than two hours. Five years ago, he didn't use to exercise. In fact, he hated exercise! He didn't use to watch exercise programmes on TV. Now, he exercises every morning. He loves to exercise now, because it makes him feel wonderful.
Mark used to smoke a pack of cigarettes a day three years ago. Now he only misses smoking when he is nervous. He chews gum at those times.
Mark also does something else to lose weight. He used to eat lots of meat, but now he always likes fruit and vegetables, so he is mostly a vegetarian now. (85) So, by changing his diet and doing daily exercise, he is in much better shape than before.
（一）补全下面的句子。
A couch potato is_  _                                         __
（二）根据短文内容，回答下面的问题。
What is Mark's opinion about exercise programmes now?
                                                             
When does Mark miss smoking?
                                                             
What does "vegetarian" mean in Chinese?
                                                             
（三）将文中划线句子翻译成汉语。