资源看点：稿件由三部分组成：lead-in部分用几句简短的话，或对教材内容进行归纳总结，或提出一个值得思考的问题，以将学生的注意力吸引到课堂中来。questions and answers的部分则是根据教材内容提出一系列前后连贯的问题，既包括教师对教材内容的解读，对作者思想情感的体会或对文章教育意义的把握。a possible version部分是将答案组织整理后可能形成的一段话或一篇文章，供老师们参考。在这一问一答过程中，教师的教学变得自然、流畅，一气呵成，让英语教学变得更轻松。

Lead-in to the passage
    Have you ever imagined what would happen if we didn’t eat? Of course we would die because we couldn’t keep our bodies alive without food. As food is the basic necessity for people to rely on for existence, in a sense all that matters to people is to have enough to eat. So how to support people with enough food is a problem that all the nations in the world have to be faced with. A Chinese scientist has solved the problem of feeding a country with a population of 13 billion.