-This returned Chinese scholar has become one of the top experts in this field.

—This returned Chinese scholar has become one of the top experts in this field.

    —Yes , I know him very well. He ___________ in Africa with wild animals for eight years.

A.has worked           B.had worked        C.worked                   D.has been working

试题答案

C

解析:

考生极易受for eight years这一时间状语的干扰，从而选完成时。其实，只要仔细审题，就不难看出这是对一般过去事实的论述。故选C。