问题补充:
I regret you that the tickets .
A. telling, have sold out
B. to tell, has sold out
C. to tell, have been sold out
D. telling, have been sold out
答案:
A. telling, have sold out
B. to tell, has sold out
(答案→)C. to tell, have been sold out
D. telling, have been sold out
解析:句意:很遗憾的告诉你,票已经卖完了。Regret一般接不定式做宾语,表示具体的动作。结合语境可知下文宾语从句中描述的是现在已经完成的动作,故用选择完成时态在,主语是动作对象,故用被动语态,选C。