In the twentieth century, drug markedly improved health throughout the world.

We can use either verbal or nonverbal forms of communication.

S. Mayo Hospital in New Orleans was so named in recognition of Dr. Mayo’s outstanding humanitarianism.

The consequences of the typhoon were disatrous due to the lack of effective measures.

The 1908 Siberian meteorite explosion brought about considerable depletion of the northern hemisphere's ozone layer.

Many doctors are still general practitioners, but the tendency is toward specialization in medicine.

If you do not understand the word "superstitious", look it up in the dictionary.

He insisted on listening to the entire story.

I told you clearly and definitely not to write your answers in pencil, Smith!

During the recession, many small companies were eradicated.

How many countries took part in the last Olympic Games?

The event, watched by millions of people all over the country, takes place annually.

In times of war, the Red Cross is dedicated to reducing the sufferings of wounded soldiers, civilians, and prisoners of war.

The yearly growth of the gross national product is often used as an indicator of a nation's economy.

When preparing a diet, a person should be aware that vitamin D acts to increase the amount of calcium absorbed by the body.

It was inevitable that the smaller company should merge with the larger one.

Sports and festivals form an integral part of every human society.

With respect to maneuverability, few birds can equal the capabilities of the hummingbird, which hovers for long periods and even flies backward.

You can make a good living in sales if you have the right attitude and strategies.

The situation seems to be changing minute by minute.

Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.