三、阅读理解(30 分，每题 2 分) 阅读下面的三篇短文，根据文章内容从 A、B、 C、D 四个选项中选最佳选项。
Passage 1African cities are forecast to urbanize(城市化）at a rate of 3. 65% annually, addling nearly 350 million new city-dwellers by 2030, according to The Brookings Institution. A billion more people are expected to be living in African cities by 2063.
