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  3. Although Brazil has its share of environmental and social problems, it has its successes too. One of these is the town of Curiti

Although Brazil has its share of environmental and social problems, it has its successes too. One of these is the town of Curiti

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问题     Although Brazil has its share of environmental and social problems, it has its
successes too. One of these is the town of Curitiba, which the authorities have 【M1】______
shown evidence of a strong vision and commitment to good environment 【M2】______
practice. In the shanty towns there are no flies or litter, because there is voluntary 【M3】______
recycling system. A constantly procession of women and children bring rubbish 【M4】______
they have been collected in bags or on wheelbarrows: for a kilo of litter they are 【M5】______
given a kilo of potato and one banana. So the streets stay clean, and people 【M6】______
don’t hurry. Public transport has also been transformed. The buses are of the 【M7】______
latest design with platform that open out at the same time as the doors, 【M8】______
enabling a large number of passengers board quickly. People buy their tickets 【M9】______
beforehand to save time, and the buses travel in their designate lanes. These 【M10】______
recent initiatives have reduced traffic delays in the rush hour.
【M3】
选项
答案is∧voluntary--a
解析 (recycling system指“再循环系统”，此处system为及物动词，因此is后应加入不定冠词a。)
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本试题收录于： B类竞赛（英语专业本科专科）题库大学生英语竞赛（NECCS）分类
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B类竞赛（英语专业本科专科）

大学生英语竞赛（NECCS）

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