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问题: when ______ about his success,the great man said w

when ______ about his success,the great man said with a big smile on his face :"sometimes finds what one isn't looking for"
A. being asked B.asked C.asking D.to ask
请写出答案,并详细分析答案的由来,谢谢!

解答:

B
男人被问,所以是被动愈态,排除C,D
因为是过去时态,不强调“正在”,所以就用一般过去时,故选B
相当于when he was asked about his success