单选题 I regret ______ him a thief, but I regret even more his stealing my watch!
A. to call B. to have called
C. having called D. called

【正确答案】 C

【答案解析】[解析] regret后面可以跟动名词(一般式-ing或完成式having done)表示对自己过去做过的事情感到遗憾或懊悔；regret后面还可跟不定式(常跟动词say/tell/inform等)表示对自己将要说的话表示遗憾。regret后面不跟不定式完成式。