Proteins are made up of folded irregularly chains, the links of which are amino acids.

Sometimes it takes me about three hours finishing my round.

By the turn of the century, most of the inventions that were to bring in all the comforts of modern living has already been thought of.

Jason’s professor had him to rewrite his thesis many times before allowing him to hand it in.

This might not matter with you, but some people are going to be negatively affected by this decision.

Aristotle, the famous Greek philosopher, believed that the brain was an organ that cooled a heart.

Her weigh has increased remarkably since she began receiving treatment.

The clerks who are happy to wait for their customer will get promoted soon.

Society uses such human emotions as proud, shame, guilt, and fear to maintain itself.

Developing new technologies are time-consuming and expensive.

Having finished his tem paper before the deadline, it was delivered to professor before the class.

Teddy Roosevelt demonstrated his competitive spirit and tireless energy in 1905 whenever he led the Rough Riders up San Juan Hill.

If I had studied carefully, I wouldn't made so many mistakes.

If today is Sunday, we would have a lot of fun at the camping site.

Not everyone realizes that the most largest organ of the human body is the skin.

It is very difficult for her to prevent him for smoking in her house.

My sister told me that she had met my teacher at the supermarket yesterday.

Although most species of small birds gather in groups at feeders provided by bird-watchers, the bright red cardinals usually appears alone or with its mate.

The chief of police demanded from his assistants an orderly investigation, a well-written report, and that they work hard.

Women nowadays have more free to participate in social activities.

There are some people in the government try to improve the lives of poor people.