---Robertisindeedawiseman.  ---Oh,yes.HowoftenIhavereg...

问题详情：

 --- 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

【回答】

D

知识点：非谓语动词

题型：选择题