英语四级阅读：BBC阅读北部白犀牛濒临灭绝危机

　　四级阅读说难是难，长篇大论，辣么多题目做不做得完是个问题;但是其实说难也不难，看的就是你是否养成了一定的阅读习惯。为了让大家养成阅读的习惯，小编为童鞋们做了BBC阅读节目。希望对大家的四级阅读有帮助。

　　如今，偷猎人猖獗，为了一己私利，让无数珍稀物种倒在枪口。同时，生态环境恶劣也导致更多的珍惜动物濒临灭绝。而仅存的4只北部白犀牛又有一员死去，从此，世界上只剩下3只北部白犀牛!

　　BBC新闻原文：

　　One of the world's last four remaining northern white rhinos has died in a zoo in the United States.

　　The condition of Nola, a 41-year-old female, had deteriorated after surgery and she was put down on Sunday.

　　Nola had been a popular attraction at the San Diego Zoo Safari Park since 1989.

　　The remaining three northern white rhinos - all elderly - are kept closely guarded at the Ol Pejeta Conservancy in Kenya.

　　Surrogacy programme

　　Nola underwent surgery on 13 November to drain a hip abscess. However, her health deteriorated a week ago and worsened again over the weekend and it was decided she should be put down.

　　The northern white rhino population was decimated by poachers seeking their prized horns, and was declared extinct in the wild in 2008.

　　San Diego zoo has recently brought in six southern white rhinos, hoping to use them as surrogate mothers for northern white rhino embryos.

　　There are about 20,000 southern white rhinos in the world, but studies are still taking place to determine whether the subspecies are genetically similar enough for the surrogacy to work.

　　Zoo researchers say that, if successful, the programme could see a northern white rhino calf born within 10 to 15 years.

　　英文小测验

　　1：列举 deteriorate的反义词

　　2：用decimate造句

　　3：根据上下文猜测poacher的意思