12．Though Alberta's Banff National Park is home to a large and healthy wildlife population，it also welcomes about 3.5million visitors every year．Besides，4.5million humans drive through without stopping，all passengers on the busy Trans-Canada Highway that cuts through the park．That's why roadkill（animals that have been killed by cars on the road） was a common sight on the world's longest national road．
Banff first put up wildlife fencing on each side of the highway．Then，since 1996，they've opened six wildlife overpasses and 38underpasses，which have allowed for more than 140，000wild life crossings．
Though these crossings are normally closed to all humans，as a tourists I was lucky to be allowed to see Banff's Red Earth Overpass with road ecologist（生态学家） Trevor Kinley．As a project manager with Parks Canada，he told me that so far，they have recorded 10，000safe animal crossings on this overpass alone．That's 10，000animals lives saved and a whole lot of roadkill prevented．
Labib Salama，an animal lover，worries that forcing so much wildlife into using just a few bridges and tunnels（passages under the ground） is putting some animals'lives into danger．They probably become easy meals for their natural enemies on either side．However，the truth is that there are no more killings around the crossings than there are anywhere else in the park．
Walking over the Red Earth Overpass，I was surprised how natural the area seemed．The noise disappeared，as did the road．The forest has filled in the area so that anyone crossing would really have no idea they were crossing a main highway along the way，I found the fresh tracks of black bears，grizzlies，wolves，elk，deer，and marten．Somehow，all these animal tracks made me so happy，knowing that they were passing safely under and over the longest road in Canada．
21．What was the problem facing Banff National Park？C
A．Some animals were in danger of dying out
B．Too many people went to visit the park．
C．Highway cars took many animals'lives．
D．Visitors were often hurt by wild animals．
22．Labib Salama worries that some animals mayC．
A．fall off the bridges
B．be killed by passing cars
C．be eaten by others easily
D．refuse to use the tunnels
23．How is the area around the Red Earth Overpass？A
A．Quiet
B．Dry
C．Dirty
D．Dangerous
24．What does the author think of the Wildlife crossings in Banff？D
A．They've made it easier for visitors to walk around．
B．They've destroyed the environment in the park．
C．It is a waste of money to build them．
D．It is a good way to protect animals．
分析 本文主要讲述了澳大利亚的阿尔伯达省的班夫国家公园在保护动物时采取的一些措施．
解答 21．C细节题．根据文章内容，Besides，4.5million humans drive through without stopping，…That's why roadkill（animals that have been killed by cars on the road） was a common sight on the world's longest national road．有4.5million 穿过马路的时候不会减速或者刹车，这样就造成了很多通行的动物被杀害，结合选项，故选C
22．C 细节题．根据文章内容，Labib Salama worries that forcing so much wildlife into using just a few bridges and tunnels（passages under the ground） is putting some animals'lives into danger．They probably become easy meals for their natural enemies on either side．由此可知，Labib Salama 担心动物们会更容易被它们的天敌攻击并被吞食，结合选项，故选C
23．A 细节题．根据文章内容，Walking over the Red Earth Overpass，I was surprised how natural the area seemed．The noise disappeared，as did the road．当我走在 Red Earth Overpass，我惊讶的发现这个地方是非常的自然，没有侵扰，噪音也消失的无影无踪，甚至连公路上也是安静的．结合选项，故选A
24．D 态度题．根据文章内容．As a project manager with Parks Canada，he told me that so far，they have recorded 10，000safe animal crossings on this overpass alone．That's 10，000animals lives saved and a whole lot of roadkill prevented．由此可知，作者觉得在阿尔伯达省的班夫国家公园的Wildlife crossings很好的保护了动物，据记录的已经拯救了很多动物的生命，结合选项，故选D
点评 本文是一个人生感悟类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，结合选项选出正确答案．推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
