River transportation in the United States consists primarily of barges pull by towboats.

The children were playing last night outdoors when it began to rain very hard.

Someone who has ever tried to pick up spilled Mercury will agree that this element is hard to handle

Mining over 2,000 years ago, copper is one of the earliest known metals.

I would be happy to see him, but I didn’t have time because of the coming examinations

Science and technology are part of the knowledges of educated people

Choose the word which has a different stress pattern from the others.

Some people waste food_______ others don't have enough.

The company suffered substantial losses after the stock market crash and found it difficult for recovering

Before dinosaurs became extinct, plant life is very different on Earth

Either Mr. Anderson or  Ms Wiggins are going to teach our class today.

I want to work as an interpreter in the future, ________, I am studying Russian at university.

There is a widespread belief that the economical situation will improve.

The Nobel Prize winning candidate, accompanied by his wife and children, are staying in Sweden until after the presentation.

You can send letters from Hongkong_______ by Suez or by Canada.

Some heating devices convert chemist energy like that found in wood and coal into heat energy.

Although the social sciences different a great deal from one another they share a common interest in human relationships.

Each of the luxury cars in the showroom was quickly sold to their new owner.

The Gray Wolf, a species reintroduced into their native habitat in Yellowstone National Park, has begun to breed naturally there.

About 200 million years before , all the continents were part of one vast land mass called Pangaea.

Since the Great Depression of the 1930’s, social programs such as Social Security have been built into the economy to help avert severity business declines.