Noun+Preposition

Eigenstates and eigenvalues are the solutions ____ the Schrodinger equation.

The reason _____ the delay was the eavy snow storm.

I have quite a lot of difficulty _____ imagining abstract things.

They told me there was an urgent need ____ blood for one of my classmates' uncle.

Recently, I've seen a speech in which they've said that it's incorrect to say there's been an increase ____ violent crimes in recent history.

I had no intention _____ letting down my family.

When you have a car accident, the police has  to begin an investigation _____ the causes.

I don't believe the people who have protested _____ the gay marriage law will never understand their actions are unacceptable in 2016.

I think we all have to show respect ____ our parent's sacrifices and achievementsdespite the circumstances.

There's no point _____ getting angry about silly things.

I had no hope _____ going to the Black Sabbath's live concert.

They've asked me to report ____ // ____ all the missing files.

The lack ____ water is becoming a very serious problem in my hometown.

My neighbour had the reputation _____ being a bad man.

I hope the government's attitude ____ // _____gay couples will change soon.