However, that is not the case at Mozambique's Gorongosa  National Park, where an astonishing 33 percent of female  elephants born after the country's conflict ended in 1992 are tuskless.

    分析：该句为主从复合句。句中“where an astonishing 33 percent of female elephants born after the country's conflict ended in 1992 are tuskless”为where引导的定语从句，修饰先行词“Mozambique's  Gorongosa National Park”；其中“born after the country's conflict ended in 1992”为过去分词短语作后置定语，修饰名词“female elephants”。

    译文：然而，这在莫桑比克的Gorongosa国家公园并非如此。在那里，令人惊讶的是，在1992年国家冲突结束后，有33%的雌象出生时就没有长牙。

8．What is the probable cause of the phenomenon mentioned in Paragraph 1?

A．Illegal hunting.B．Constant farming.

C．A pure coincidence.  D．Natural evolution.

解析：A　考查细节理解。根据第一段尾句“The researcher thinks we may be witnessing unnatural evolution of the species due to the constant hunting of elephants for valuable ivory”可知，这位研究人员认为，由于持续不断地猎杀大象以获取珍贵的象牙，我们可能正在目睹该物种的非自然进化。据此可知，第一段中提到的现象的可能原因是非法猎杀大象，故A项正确。