我尽了最大努力按时完成这个项目。

I ___did ___my ___best to finish the project on time.

医生们说他们会尽最大努力帮助她。

The doctors said they will ___try ___their ___best to help her.

即使你没有赢，只要尽力就好。

Even if you don't win, just ___do ___your ___best.