【题目】—Do you regret (bring) up your opinion that every child should take part in service learning?
—No. On the contrary, I think it is very necessary.

【答案】ringing
【解析】句意：——你为提出每个孩子都应该参加服务学习的观点后悔吗？——不。相反，我认为很必要。根据句意可知，这个观点已经提出，所以用regret doing，表示“后悔干过某事”。故填bringing。