I regret ________ that I'm too busy ________ in the talk．
A.to say; to participate
B.saying; participating
C.to say; participating
D.saying; to participate
网友回答
C解析考查非谓语动词。regret to say很遗憾地说；be busy doing忙于做某事。有些动词或词组既可以跟动名词作宾语，也可以跟不定式作宾语，但意义上有区别，要特别注意。