他铁了心要在年底前完成马拉松训练。

He's ___dead set on completing his marathon training by the end of the year.

她是个绝对的天才，每次考试都拿满分。

She's a ___definite genius, scoring full marks in every exam.

他直接了当地盯着我，说出了他的想法。

He looked at me ___dead set and told me exactly what he thought.