Passage 23（2020 •贵州省安顺市）

Trash collection is problem for Curitiba. First, the city has only one landfill. Second, its garbage trucks do not fit on some of the streets in the city's low- income（低收入）neighborhoods. Curitiba knew the solution lay in getting everyone involved（参加）.
In 1989, the city started a recycling program called Garbage That Is Not Garbage. The city set up a central recycling center for sorting（把…分类）recyclable materials, food-based and waste. Colorful cartoon characters were symbols of different kinds of recyclable materials, which could help children get to know the importance of recycling. Collection bins were the same colors as the cartoons, reinforcing（加强） the message. People made money by picking up the trash at these bins and taking it to the center for processing. Today, Curitiba claims to have the highest recycling rate of any city in the world.
Câmbio Verde, the Green Exchange program, and Compra do Lixo, the Buying of Garbage program, are successful recycling programs in Curitiba. They get low-income- residents（居民）to join in the city's recycling program by having them transport trash from neighborhoods that are hard for garbage trucks to reach.
Depending on what they deliver, people exchange their trash for cash, food and services. Their way of life is improved, and the city is better able to manage its trash. These programs are one way Curitiba has gotten creative as a green city. It shows how involving everyone can make green living possible.

【文章大意】本文主要分析了造成库里提巴这个城市垃圾收集问题的原因，及政府采取的有效措施。
71. Reasons/The reasons/ Two reasons    
【解析】根据上文Trash collection is problem for Curitiba First, the city has only one landfill. Second, its garbage trucks do not fit on some of the streets in the city's low- income（低收入）neighborhoods. Curitiba knew the solution lay in getting everyone involved垃圾收集是库里蒂巴的问题，首先，城市只有一个填埋场。第二，它的垃圾卡车不适合在城市的低收入社区的一些街道上。库里蒂巴知道解决办法是让所有人都参与进来。可知第一段主要讲造成库里蒂巴垃圾收集问题的两个原因，故答案为Reasons/The reasons/ Two reasons。
72. Garbage trucks   
【解析】根据上文Second, its garbage trucks do not fit on some of the streets in the city's low- income（低收入）neighborhoods. 它的垃圾卡车不适合在城市的低收入社区的一些街道上。可知垃圾卡车不能到达这个城市的每个角落，故答案为Garbage trucks。
73. was set up    
【解析】根据上文The city set up a central recycling center for sorting recyclable materials, food-based and waste. 该市设立了一个中央回收中心，用于把可回收材料、食品和废物分类。本句主语为单数名词The city，由谓语动词set up，可知此处为“set”的一般过去式，所以其被动应改为一般过去时的被动语态：A central recycling center was set up by the city.根据句意，故答案为was set up。
74. transport trash    
【解析】根据上文They get low-income- residents（居民）to join in the city's recycling program by having them transport trash from neighborhoods that are hard for garbage trucks to reach.他们让低收入居民加入城市的回收计划，让他们到垃圾车难以到达的社区运送垃圾。故答案为transport trash。
75. makes a difference/ can play a role
【解析】根据上文It shows how involving everyone can make green living possible.它展示了如何让每个人都能让绿色生活成为可能。可知每个人都为绿色生活成为可能而发挥着作用。动词短语make a difference/ can play a role“发挥着作用”，原句为一般现在时。主语Everyone为单数，故动词用三单形式，故答案为makes a difference/ can play a role。