People are destroying the air by adding ...... to it.

The weightlifter who allegedly took performance-enhancing drugs have been named today.

In the nineteenth century, women used quilts to inscribe their responses to social, economic, and politics issues.

Choose the correct answer to complete the sentence. "He was admired for _____ donated a lot of money to environmental protection campaigns"

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

Every society changes, but not change at the same rate or in the same direction .

After the accident there was a solid line of cars stretched back for several miles

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

She thinks they will come, _    ?

Believed that Jack had got home safely, we felt relieved.

The prices of homes are as high in urban areas that most young people cannot afford to buy them 

Nuclear powers production in the us is controlled by the Nuclear Regulatory Commission [NRC].

Few people realize that the musician of the national anthem of the United States originally belonged to the British drinking song.

The diameter of the Sun is more than one hundred times greater than the Earth.

The Department of Foreign Languages are not located in the new building opposite the old one.

An octopus has three hearts to pump blood throughout their body.

Per capita income is a nation’s entire income dividing by the number of people in the nation

Public health experts say the money one spends avoiding illness is less than the cost to be sick

Karen hasn’t decided still if she wants to run for the Presidency again this year.

If dinosaurs would have continued roaming the earth, man would have evolved quite differently.

For thousands of years, people have used some kind of refrigeration cooling beverages and preserve edibles