During / for

I will finish the novel ............. the summer break. 

We have known each other ............. a long time. 

He worked in this company ........... over twenty years.  

She was in the hospital ........... a week.

My father has been in Paris .......... six days.

We were on a vacation .............. a week.

The film lasted .............. 2 hours.

All the hotels are full ................. the summer season.

My uncle has been working as a mechanic ............... twenty-five years.

They study ............. two hours every day.

I'll eat this lemon cake .................... my break.

I can't use my smart phone .......................... my lessons.