谢谢，但我真的不能再吃一块蛋糕了。

Thanks, but I ___honestly couldn't eat another piece of cake.

说实话，我不知道该做什么，我想哭。

___Honestly, I did not know what to do, I wanted to cry.

我真心认为你应该为你的错误道歉。

I ___honestly think you should apologize for your mistake.