When _____ about the secret of his success, Steven gave us a smile and said nothing . A. asking B. h...
2023-02-01 20:12:38 201次 2010-2011年贵州省高二下学期期末考试（英语） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
When _____ about the secret of
his success, Steven gave us a smile and said nothing .
A. asking
B. having asked C. ask
D. asked
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