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（生態(tài)學家） 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 本文主要講述了澳大利亞的阿爾伯達省的班夫國家公園在保護動物時采取的一些措施．
解答 21．C細節(jié)題．根據(jù)文章內(nèi)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 穿過馬路的時候不會減速或者剎車，這樣就造成了很多通行的動物被殺害，結(jié)合選項，故選C
22．C 細節(jié)題．根據(jù)文章內(nèi)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 擔心動物們會更容易被它們的天敵攻擊并被吞食，結(jié)合選項，故選C
23．A 細節(jié)題．根據(jù)文章內(nèi)容，Walking over the Red Earth Overpass，I was surprised how natural the area seemed．The noise disappeared，as did the road．當我走在 Red Earth Overpass，我驚訝的發(fā)現(xiàn)這個地方是非常的自然，沒有侵擾，噪音也消失的無影無蹤，甚至連公路上也是安靜的．結(jié)合選項，故選A
24．D 態(tài)度題．根據(jù)文章內(nèi)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，作者覺得在阿爾伯達省的班夫國家公園的Wildlife crossings很好的保護了動物，據(jù)記錄的已經(jīng)拯救了很多動物的生命，結(jié)合選項，故選D
點評 本文是一個人生感悟類閱讀，題目涉及多道細節(jié)理解題，做題時結(jié)合原文和題目有針對性的找出相關語句進行仔細分析，結(jié)合選項選出正確答案．推理判斷題也是要在抓住關鍵句子的基礎上合理的分析才能得出正確答案，切忌胡亂猜測，一定要做到有理有據(jù)．
