He has too much ... work to do

He has too much interesting work to do. — У него слишком много интересной работы. — Did he have too much interesting work to do? — Who has too much interesting work to do?

He has too much difficult work to do. — Он слишком много трудной работы. — Did he have too much difficult work to do? — Who has too much difficult work to do?  

He has too much hard work to do. — Он имеет слишком много тяжелой работы. — Did he have too much hard work to do? — Who has too much hard work to do?