Species like snakes, lizards, coyotes, squirrels, and jack rabbits seems to exist quite happily in the desert.

Teddy Roosevelt demonstrated his competitive spirit and tireless energy in 1905 whenever he led the Rough Riders up San Juan Hill.

Dinosaurs became extinct millions of years ago because of the earth's climate changed drastically.

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

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

When she heard the news, she got so a shock that she dropped her glass.

These snakes will not cause you any serious harm. They are harmful.

I was amazed that Smith showed so few grief at his mother’s death.

After spending two days arguing about where to go for their holidays, is was decided that they shouldn’t go anywhere.

The big problem was that we really did not understand what was happened

John announced that he could not longer tolerate the conditions of the contract under which he was working.

Narcissus, a character in mythology, gazed at his own image in a pool so ardently that he fell into itself and downed.

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

When mining for gold, you must first obtain the gold ore and then apart the gold from the ore.

Both Mr. and Mrs. Smith are explaining the children the rules of the game.

Because they had spent too many time considering the new contract, the students lost the chance to lease the apartment.

Each of the nurses report to the operating room when his or her name is called.

Neither of the men arresting as terrorists would reveal information about his group.

Neither William or his brother stole the rambutans from our orchard.

David, who mother is Vietnamese, speaks both Vietnamese and English fluently.

By measuring the color of a star, astronomers can tell how hot is it.