把下列带序号的句子依次填人文中横线处，使上下文语意连贯。（只填序号）
二十世纪最伟大的发现，莫过于对环境危机的发现，_______________。当“拯救地球”成为全世界的共同，呼声，环境问题便超越了国家、种族、文化和贫富，成为人类迫在眉睫的“天”大问题。
①从畏惧自然到征服自然，我们的祖先一路披荆斩棘、高歌猛进。
②只有在付出沉重代价后，才终于懂得了必须善待自然，与自然和谐相处。
③这是人类几千年文明史的根本性转折。
③①②
| 阅读短文，完成下列各题。 | |
They usually have eggs, some meat, bread, fruit juice and coffee. Lunch is between twelve and one o'clock. It is a light meal and working people must take lunch with them or get it near their workplaces. Children in school take sandwiches, fruit, and cookies with them or eat in school. Dinner, the main meal (主餐), is between six and eight in the evening. People cook it carefully. They may have meat or chicken, turkey (火鸡) or ducks. They may all have potatoes or rice, vegetables or salad. The drink is coffee, tea or milk. Then comes the dessert (餐后甜点). 根据短文内容，选择正确答案。 | |
| 1. Americans have breakfast ______________. | |
[ ] | |
| A. at eight o'clock B. in the afternoon C. after eight o'clock D. before eight o'clock in the morning | |
| 2. _____________ is the most important meal in a day. | |
[ ] | |
| A. Breakfast B. Dinner C. Lunch D. Meal | |
| 3. There are ______________ meals in a day in America. | |
[ ] | |
| A. one B. two C. three D. five | |
| 4. Americans usually have breakfast and dinner at ______________. | |
[ ] | |
| A. home B. office C. school D. workplaces | |
| 根据短文内容，判断句子正(T)误(F)。 ( ) 5. Breakfast usually comes before seven o'clock in the morning. ( ) 6. Americans usually have eggs, some meat, bread, milk and rice for breakfast. ( ) 7. Lunch is a light meal. ( ) 8. The dessert comes after dinner. |