[解析]
(1)C词义猜测题.根据第二段The International Union for Conservation of Nature (IUCN) downgraded the species from"endangered"to"vulnerable"as the union released its updated Red List on Sept 4 at Hawaii.9月4日,世界自然保护联盟于夏威夷发布了最新的濒危物种红色名录.其中,大熊猫的受威胁程度从"濒危"降级为"易危".根据句意可知选C.
(2)C细节理解题,根据文中Just by restoring the panda's habitat,that's given them back their space and made food available to them,通过恢复栖息地,大熊猫重获了生存空间和充足的食物,故选C.
(3)B推理判断题.根据第一段Good news for giant panda lovers:The cute and cuddly creature has just been brought back from the brink of extinction.大熊猫的粉丝们最近收到一则好消息:憨态可掬的大熊猫已经不再濒危了.根据最后一段第一句Despite the improved statuses,wild animals like the giant panda and the Tibetan Antelope still face great challenges.尽管情况有所好转,但大熊猫和藏羚羊等野生动物依然面临着严峻的生存挑战.可知本文的目的是在告知人们,故选B.
(4)B推理判断题.根据最后一段第一句Despite the improved statuses,wild animals like the giant panda and the Tibetan Antelope still face great challenges.尽管情况有所好转,但大熊猫和藏羚羊等野生动物依然面临着严峻的生存挑战.故选B.