Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can getits root causes and find cures

He gave up his job _    he earned much money.

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

Although almost all insects have six legs, a immature insect may not have

The builders of variety ancient cliff ruins scattered throughout canyons and mesas of the arid Southwest of the United States are known as the cliff dwellers.

Disease is not as widespread than before because of better preventive medicine and vastly improved nutrition

Unfortunately, much of the early history of Zimbabwe is still unknown, for example, we know a little about early patterns of settlements.

Many bridges in England were covered with wooden roofs to protect it from rain and snow

Though he did not develop language, Laurent Clerc brought it on America from France.

Australian koalas are furry, gray animalthat live in trees and feed on leaves

In purchasing a winter coat, it is very important for trying it with heavy clothing underneath.

If anything urgent comes _____, you can contact me at this number. 

To the men who worked so hard on project, the news was profound disappointing.

As the plane went more faster the runway, David began to sweat nervously.

The abilities to work hard, follow directions, and thinking independently are some of the criteria for success n the workplace.

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

Industrialist Henry Ford introduced assembly-line techniques into manufactures of  vehicles.

When contented and occasionally when hunger, cats frequently make purring sound.

While the sun is the major source of ultraviolet rays, it is not source only

Interestingly, the United States both produces or uses more crude oil than other nations.

Villagers are hoping for raining this month after year of dry weather.