2014春季英语人教版新课标必修4u2导
学案（2）必修4 unit 2 working the land 第2课时 reading 《课前练习》阅读理解 when you hear the word “farm”，chances are your picture of rolling hills in the country covered with cows and corn.but some scientists，engineers and city planners say the farms of the future could be indoors inside skyscrapers(摩天大楼) in the world’s most populated cities.
