◎ 题干
— 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. is working
B. had worked
C. worked
D. has been working
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Openthewindow,please.[ ]A.HereyouareB.OK…”主要考查了你对  【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。