[解析]
CGADB
(1)C.文章衔接题.根据后文However,many of our animal friends are about to leave us forever and it's our fault.可知然而,我们的许多动物朋友将永远离开我们,这是我们的错.C项:Humans share the Earth with many different kinds of wildlife.人类与许多不同种类的野生动物共享地球.符合文意,故选C.
(2)G.语境辨析题.根据前文The World Wildlife Fund rates all of the species facing a very high risk of extinction in the wild as "critically endangered".Now there are 2,464 animal and 2,104 plant species with this assessment,compared with 1998 levels of 854 and 909 respectively.可知世界野生动物基金会将所有面临野生动物大灭绝风险的物种都评为"极度濒危".本次评价动物2464种,植物2104种,而1998年只有854种和909种.G项:Here are some of the species that may not live to see 2018.下是一些可能无法活到2018年的物种.符合文意,故选G.
(3)A.理解判断题.根据后文Three subspecies(亚种),including the western black rhinos,were declared extinct by the International Union for Conservation of Nature in 2011.可知2011年,国际自然保护联盟宣布三个亚种,包括西方黑犀牛灭绝.A项:Fewer than 5,000 are left in the eastern Africa.在东非黑犀牛只剩下不到5000只.符合文意,故选A.
(4)D.联系上文题.根据前文Second,South China Tiger.This species of tiger hasn't been seen in the wild for 25 years in China.可知第二是华南虎.这种虎在中国野外已经有25年没有被发现了.D项:The country's rapid development has meant that they live in areas too small to support them.这个国家的快速发展意味着他们居住的地区太小,无法支持它们.符合文意,故选D.
(5)B.理解判断题.根据前文The Yangtze River was once home to two porpoise species,but one,the Baiji dolphin,went extinct in 2006.There are fewer than 2,000 Yangtze finless porpoises now.可知长江曾经是两种海豚的故乡,但其中一种是白鳍豚,2006年灭绝,现在长江中的江豚不到2000只.B项:It could go the same way because of overfishing and pollution.由于过度捕捞和污染,长江江豚也可能会以同样的方式灭绝.符合文意,故选B.