Four-fifths of the world's computers use programs (at/in/on/about) English.

Ottawa is .......... Canada.

We started our journey ______ foot.

If you don’t want to watch TV. Turn it______________, please.

My plan is similar ____________ yours, but it is different Ken’s.

Are you worried _____ the final examination?

Mary always take good care__________ her children.

She has become very famous .......... her novels.

Have you read any books .......... Agatha Christie?

What have you got ......... your mouth?

Look! That car is .............. ! Someone calls the fire brigade.

China became the third country in the world to be able to independently carry __________ manned space flights.

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

This variety of seed is inferior ______ the type I planted last year.

Why were you so unfriendly .......... Linda? Have you had an argument with her?

Mr. Green is responsible ___________ hiring employees.

Her parents are very pleased _______________ her French.

Damage to the building resulted ________ an usually high wind.

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

Gas is made .......... coal.

You should make use___________ the books you have.