工人们怀疑有个告密者向管理层透露了罢工计划。

The workers suspected a ___fink had leaked their strike plans to the management.

他因为害怕被抓，把同伙的事情全告诉了警察。

He ___informed on his partners to the police because he was afraid of getting caught.

那个告密者是个卑鄙小人，大家都讨厌他。

That snitch is a dirty ___fink that everyone despises.