He had the good fortune to______with Prof. Wang for 3 years.

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问题 He had the good fortune to______with Prof. Wang for 3 years.

选项 A、study
B、be studying
C、have studied
D、have been studying

答案C

解析 to have studied表示已经完成的动作，句中有明确的时间状语for 3 years。

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