单选题
He had the good fortune to ______ with Prof. Wang for 3 years.
A. study
B. be studying
C. have studied
D. have been studying
A
B
C
D
【正确答案】
C
【答案解析】
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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