Air pollution, together with littering, are causing many problems in our large, industrial cities today.

Because it is a healthy way to exercise, aerobic dancing is considered as an excellent method for release tension.

Before the formation of labor unions, individual workers had almost not voice in determining their wages, hours, or working conditions.

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

George Washington, his portrait appears on the quarter coin and the dollar bill, served two terms as president.

Choose the correct answer to complete the sentence. "Planting trees can contribute to _____ global warming"

If we come home on time, our step-mother will be angry.

Bats use echoes of their own high – frequency sounds to detect food and avoiding obstacles.

Gunpowder, in some ways the most effective of all the explosive materials, were a mixture of potassium nitrate, charcoal, and sulfur

He never goes home before he will finish his work.

Abraham Lincolns boyhood home resembled those of many others midwestern pioneers, with its dirt floor, sleeping loft, and crude fireplace.

After the police had tried unsuccessfully to determine to who the car belonged, they towed it into the station.

The Joshua tree is marked by their sword shaped leaves and greenish white flowers.

The threat of being dismissed do not worry me any more because I have started my own business.

Neither of the two candidates who had applied for admission to the Industrial Engineering Department were eligible for admission.

My city stops the flow of water, creating a reservoir and raise the flow of water.

Choose the correct answer to complete the sentence. "Humans now have to suffer the effects of global warming due to having_____ the environment irresponsibly"

Choose the correct answer to complete the sentence. "Climate change leads _____ numerous catastrophic consequences"

There is the very real possibility that these animals could panic, frighten and would break away, should there be a sudden loud noise

The steam engine is usually thought of as a relative modern invention, but the Greeks built a kind of steam engine in ancient times

A coral reef, a intricate aquatic community of plants and animals, is found only in warm, shallow, sunlight seas