He worked hard ________ a mechanic for ten years before being appointed manager.

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

The pens made___________ plastic are very cheap.

You’ve got a dirty mark ............... your cheek. Have a look ........... the mirror.

He was accused _____________ having stolen a car.

Reviewers describe books _______ “hard-to-put-down”, or “hard-to-pick-up-again”.

I was standing .......... the back, so I couldn’t see very well.

Education in many countries is compulsory ....... the age of 16.

She is famous _____________her beautiful face and sweet voice.

Maintaining biodiversity is important _______ us in many ways.

The flood was responsible __________ damaging the crop.

It is .......... three o'clock; it is nearly a quarter past three.

The computer isn’t working. It broke____________ this morning.

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

This area is rich _________ oil.

Vietnam carried _________an intensive program for its athletics, which included training in facilities, both home and abroad.

Are you going away .......... the beginning of August or .......... the end?

I write letters _______ my right hand.

The children are really excited _____ their summer vacation.

Are you worried _____ the final examination?

I always come _____ school _____ foot.