A
Although the idea of “zero emission，net carbonpositive，sustainable(可持续)” development was promoted worldwide，most cities are at a loss what to do or even some have objected to it.But in Liuzhou，a city in southern China，attitudes could not be more different.
The Liuzhou Municipality Urban Planning Bureau has signed up Italian architect Stefano Boeri，the father of the forest city movement，to build a selfcontained community for up to 30，000 people.He is the goto man for such projects thanks to the success of his “vertical forests”，two residential(住宅的) towers.Completed in 2014，they remove up to 17.5 tons of soot(煤烟) from the air each year，and a year later one of them was named Best Tall Building Worldwide.
The Liuzhou project is a much more ambitious undertaking，however.Its homes，hospitals，hotels，schools and offices will be built on a 340acre site in what Boeri calls the first attempt to create an “urban environment that is really trying to find a balance with nature”．Its 100 species of plant life are expected to absorb almost 10，000 tons of carbon dioxide and 57 tons of pollutants per year，while at the same time producing 900 tons of lifegiving oxygen.
Although the architects haven't published the cost of the forest city，the Milan towers cost only five percent more than traditional skyscrapers.
The construction of his forest city at Liuzhou is set to begin in 2020，and there is still a great deal of planning and research required before a projected completion date can be set.However，Boeri remains optimistic about the project and has confidence in the soundness of his vision：“I really think that bringing forests into the city is a way to deal with global warming.”
【语篇解读】 本文是一篇科普类短文。文章主要介绍了中国南方城市柳州为改善环境，实现可持续发展，将建立一座森林城市。
1．What's Liuzhou's attitude towards the sustainable development?
A．Approving. B．Cautious.
C．Unfavorable. D．Doubtful.
A [细节理解题。根据文章第一段“Although the idea of...could not be more different.”可知，大多数城市反对，而柳州的态度却截然不同。故选A。]
2．Why is Stefano employed for the Liuzhou project?
A．He volunteered to do the project.
B．He is a famous architect in the world.
C．He is the father of the forest recovery.
D．He has gained experience in similar projects.
D [推理判断题。根据文章第二段“He is the goto man for such projects thanks to the success of his ‘vertical forests’，two residential towers.”可知，由于他的“垂直森林”——两座住宅楼的成功，他是此类项目的关键人物。从而推断出，他在类似的项目中积累了经验。故选D。]
3．What does the underlined word “they” refer to?
A．The architects. B．The two towers.
C．Forests in the city. D．The residents of the city.
B [词义猜测题。根据文章第二段第二句“He is the goto man for such projects thanks to the success of his ‘vertical forests’，two residential towers.”可知，they指代前句中的two residential towers。故选B。]
4．What's the purpose of Liuzhou project?
A．To provide more jobs.
B．To bring forest into city.
C．To solve house shortage.
D．To improve the environment.
D [推理判断题。根据文章第三段“Its homes，hospitals，hotels...producing 900 tons of lifegiving oxygen.”和最后一段“However，Boeri remains optimistic...a way to deal with global warming.”可知，柳州建造森林城市可以减少污染，从而推断出，其项目的目的是改善环境。故选D。]
