Prepositions of time and place

I`d like to study law __ university.

We have to hand in our work to the teacher __ next Monday.

Hurry! The lesson starts __ five minutes.

My school is in Grove Street, right __ the city centre.

Don`t be late for the ceremony. You know it always starts __ time.

__ the back of this photo there are three students laughing at something.

__ 50 years` time traditional notebooks will be a thing of the past.

Some students cannot concentrate when sitting __ their desk.

Lets meet __ the front of the school building.

We`re having a school party __ Saturday night.