—You were brave enough to raise objections at the meeting.
— Well, now I regret ________ that.
A、todoD
regret后所跟动词有todo与doing两种形式，不定式表示“为做某事而遗憾”，doing表示“为做过某事而后悔”。“havingdone”则更强调动作已发生而无法挽回。
名词解释：privateinternationallaw
Toaworker,________fromthepointofviewofsocietyisnecessarylaborisfromhisownpointofviewvoluntaryplay.
名词解释：preferredstock
Iwouldlove________tothepartylastnightbutIhadtoworkextrahourstofinishareport.
Theybuiltahighway_______themountains.
