他在选举中面对一个政治对手。

He faced a political ___opponent in the election.

提议削减支出的主要反对者将于今天晚些时候会面。

Leading ___opponents of the proposed spending cuts will meet later today.

他们的反对者认为动物园对动物很残忍。

Their ___opponents argue that zoos are cruel to animals.