—Robertisindeedawiseman.  —Oh,yes.HowoftenIhaveregrett...

問題詳情：

 —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

知識點：非謂語動詞

題型：選擇題