Did you have a good time _____ Christmas?

This book is based _____ part on fact.

He is a friend .......... mine.

If you earn a good salary, you can be independent .......... your parents.

I like to shower in the morning, but my roommate likes to shower ____ night.

No one knew precisely what would happen _____________ a human being in space.

What do you know .......... him?

Are you acquainted _____ the lady?

Will this office be adequate ____ your company's need?

The boy is afraid (of/on/in/about) snakes.

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

Most children are ill-prepared (to/for/from/at) employment.

She is accustomed __________ getting up early.

She is very angry ......... me.

He insisted ______ taking us dinner.

A beautiful clock was given _________ her by a handsome boy.

“Where’s the light switch?” “It’s ........ the wall ........... the door.”

The children are really excited _____ their summer vacation.

We have to apply effective measures to save many plant and animal species ........ extinction.

Please write your answers ......... ink.

I have not done my exercise .......... now.