问题
选择题
—Robert is indeed a wise man.
—Oh，yes.How often I have regretted ______ his advice!
A．to take
B．taking
C．not to take
D．not taking
答案
答案：D
regret doing sth.“后悔做过某事”；regret to do sth.“抱歉要做某事”。由题干可知，要用D项表示“对没接受建议而感到后悔”。