2013高考英语一轮过关训练题：北师大版选修7Unit21（答案）
Ⅰ.完形填空
What will the city of the future look like？No one knows for sure, and making predictions is a risky business. But one thing is__1__ －they are going to get bigger before they get smaller.
To find out what young people think about the future of urban life, a teacher at a university in Texas in the United States__2__ his students to think how they would run a city of 150,000 people in the __3__2025. Here are some of the __4__ th
