He has a great deal of books most of which are on science and technology.

Ecologists are trying to preserve our environment for future generations by protecting the ozone layer, purifying the air, and have planted the trees that have been cut down.

A smile can be observed, described, and reliably identify, it can also be elicited and manipulated under experimental conditions.

For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

When a patient's blood pressure is much higher than it should be, a doctor usually insists that he will not smoke.

Paris is much more exciting as I expected.

The number of students attending universities to study economics have increased steadily in the last few years.

The earth is the only planet with a large number of oxygen in its atmosphere.

However type of raw materials is used in making paper, the process is essentially the same.

English, together with Literature and Maths, are compulsory subjects in the national curriculum.

Sometimes it takes me about three hours finishing my round.

The Greek historian Herodotus reported that one hundred thousand men are employed for twenty years to build the Great Pyramid at Gizeh.

It is important that you turned off the heater every morning before you leave for class.

If you work hard, you would be successful in anything you do.

The bus was plenty of people who had spent many a happy hour shopping at the new.

I enjoyed talking to the people with that I met at the party last night.

The longer the children waited in the long queue, the more impatiently they became

If I had enough money, I would have travelled around the world.

Students suppose to read all the questions carefully and find out the answers to them.

There was a gradual raise in the number of literate males and females in the lowlands.

Anyone reproducing copyrighted works without permission of the holders of the copyrights are breaking the law.