t is a common knowledge that Douglas intends to retire at the end of season

The native people of Americans are called Indians because when Columbus landed in Bahamas in 1492, he thought that he has reached the East Indies

None two butterflies have exactly the same design on their wings.

When he took the ticket out of from his pocket, a hundred dollar bill fell to floor without noticing.

Commercial letters of credit are often used to financing export trade, but they can have uses.

Constantly staying in cold weather may bring _______ pneumonia. 

Yogurt contains a higher percentage of lactic acid than another  fermented milks, it is rich in B-complex vitamins.

Stars derive their energy from thermonuclear reactions that take place in heat interiors.

Only averaged about 5 feet above sea level, the Marshall Islands would disappear under the Pacific should the Arctic icepack melt

Julie’s mother abandoned her when she was a few of months old and she grew up in an orphanage.

A great aviation pioneer, Amelia Earhart was already famous when she sets out on her ill-fated attempt to circle the globe 1937’s.

“How does the human brain work?” remains one of the most profound questions confront modern Science

Not one in one hundred children exposed to the disease are likely to develop symptoms it.

A seismograph oscillation of the ground caused by seismic waves, vibrations that travel from its point of origin through the Earth or along surface

Genetic engineering is helping researchers unravel the mysteries of previously incurable diseases so that they can get to its root causes and find cures

The common form of treatment it is mass inoculation and chlorination of water sources

To receive a degree from an American university, onetake courses beside those in one’s major field.

The Dave Brubek Quartet, of the most popular jazz bands of the 1950s, had a particularly loyal following on campuses college.

Identify the error in each sentence: Despite there are some disadvantages, the potential of alternative sources of energy is great.

Most of damage property attributed to the San Francisco earthquake of 1906 resulted from the fire that followed.

After the team of geologists had drawn diagrams in their notebooks and wrote explanations of the formations which they had observed, they turned to camp-side to compare notes