The discover of gold and silver in rugged mountains of Nevada in 1858 attracted many fortune-seekers to that area.

Before his death, John Dewey saw his philosophy have a profound influences on education and thought in United States and elsewhere.

Mr Ross, our old history teacher ruled his classes by a rod iron

After George had returned to his house, he was reading book

An escalator is a moving stairway that transporting people from one point to another by means of linked thread

Manyamny Civil War battles were fought in Virginia than in other state.

She sighed with relief when she found out that she has passed the test

You’re Cynthia, ____ you?   

The refugees are much upset because they have been deprived from their homeland and their families

Running along 180th meridian, the International Date Line is separated day from another

In spite modern medical technology, diseases caused by viruses are still not curable

The signing of peaceful treaty was an event of major importance.

The coal is the world’ abundant fossil fuel .

In the early days of development, jet engines used numbers of fuel

He gave up his job _    he earned much money.

Internet , definitely causes some in society , however, it surely provides many benefits as well.

Were you brought _____ in the city or in the country? 

Inventing by Roger Bacon, the magnifying glass led to the creation of scientific tools which have produced immeasurable scientific progress

Not until ecent has interest in synthetic fuels been revived.

Protecting Florida’s coral reefs is difficult because some of the corals are very fragile even the touch of diver’s hand can kill it.

Two unique features of the Arctic they are lack precipitation and permanently frozen ground.