阅读下列短文,从每篇短文后所给各题的四个选项(A、B、C和D)中,选出最佳选项。A A farm planted levels or floors is called a vertical(垂直的)farm.A skyscraper type building can house a vertical farm.Since the garden is built upwards,rather than outwards,it requires much less space than a conventional farm.The world is quickly running out of room for conventional farming.Vertical farms could be a key to this situation.An 18-story vertical Read the following essays, choosing the best of the four options (A, B, C and D) for each question given after each essay. AA farm planted levels or floors is called a vertical (vertical) farm. A skyscraper type building can house a vertical farm. Since the garden is built upwards, rather than outwards, it requires much less space than an conventional farm. The world is quickly running out of room for conventional farming. Verian farms could have a key to this situation. Ann 18-story vertical