—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
C
考生極易受for eight years這一時間狀語的干擾，從而選完成時。其實，只要仔細審題，就不難看出這是對一般過去事實的論述。故選C。
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