Choose the correct answer to complete the sentence. "One of the main greenhouse gases that lead to global warming _____ carbon dioxide"

Although he was happily married, he preferred spending lately hours at work to spending evenings lately at home

The Medal of Honor is the higher award for military bravery that can be given to any soldier of the United States

The public ceremonies of the Plains Indians are lesser elaborate than those of the Navajo in the Southwest.

It took the mayor over an hour explanation to the other members of the board why he had missed the last meeting.

They are known that colds can be avoided by eating the right kind of food and taking exercise regularly.

Jessamyn West’s first and most famous novel, the friendly persuasion, describes the life of the Quaker farmed family in the mid-1800’s.

It is time the government helped the unemployment to find some jobs.

Choose the correct answer to complete the sentence. "Humans now have to suffer the effects of global warming ______ having treated the environment irresponsibly"

If the Oxygen supply in the atmosphere was not replenished by plants, it would soon be exhausted.

Rita is studying........... English and ...........math this semester. 

In the sixteenth century, Francois Vieta, a French mathematician, used the vowels “a”, “e”, “i”, “o”, “u” to represent a unknown numbe

In the 1920’s, cinema became an important art form and one of the ten largest industry in the United States.

The Library of Congress, located in the nation’s capital, houses history documents and photographs as well as most books published.

In the United States, about 75 percent of the total tomatoes crop is processed into juice, caned tomatoes, sauces, pastes, and ketchup.

I’m just going to the shops; if anyone rings, tell them I will be back for a few minutes.

Today’s nuclear fission fuels are the remnants of which used to be a much more active mixture of radioactive and fissionable materials two billion years ago and earlier

Both a term paper and a final exam is often required for a college class.

Choose the correct answer to complete the sentence. "Having denied the ______ for the environment it caused, the factory was forced to close down"

Scuba diving is usually carried out in the ocean in that people can explore the underwater world.

I’m sorry I missed seeing my old friend at your party. I wish I ______.