总统为他的计划奋斗到底。

The president fought for his plan ___to ___the ___bitter ___end.

我们已准备好为捍卫自己的权利战斗到底。

We are ready to fight ___till ___the ___bitter ___end for our rights.

活动人士发誓要将抗议进行到底。

The activists vowed to continue their protest ___until ___the ___bitter ___end.