There is an increasing demand _____ taller building in big cities.

Mozart died ________ Vienna in 1791 _________ the age of 35.

When are you leaving __________ Singapore? This week or next week?

We rejoice .......... her success.

We can't get access _______ the Internet where we live.

He always prevents me_______ doing my duty.

Mr. Johnson said he was ......... favor of doing the work right away.

He insisted ______ taking us dinner.

They chose him .......... their leader.

We’ll buy a smaller house whenthe children have grown____________ and left home.

Every student should spend .......... least two hours on his homework every night.

Is the United States the wealthiest country ______ the world?

She saw a butterfly .......... the window.

Thank you very much____________ inviting me to your party.

It was very kind .......... you to lend me the money I needed.

He’s getting bored_____________ learning_____________ heart.

Toxic chemicals in the air and land have also driven many species ______ the verge of extinction.

I don't think that I'm acquainted .......... him.

Someone left a box in the garden and I fell .......... it in the dark.

He is sad (about/in/on/of) his son’s laziness.

She was sad because he was very rude ____________ her.