collude|colluded|colluding

这两家公司密谋操纵市场价格。

The two companies ___colluded to manipulate market prices.

这些学生被发现考试时互相串通作弊。

These students were caught ___colluding to cheat on the exam.

他们被指控私下串通操纵比赛结果。

They were accused of ___colluding to manipulate the game results.