Although ferns lack flowers, they do have leaves, stems, and root.

Choose the correct answer to complete the sentence. "Deforestation is one of the _____ environmental threats to the ecological balance in the world"

Nga speaks English very well, _    ?

Deep cratered, the moon is over 2100 miles in diameter with negligible gravity and atmosphere.

It is estimated that about 640 women remain illiterate in ............ world, mostly in developing countries. 

Men and women in the Peace Coips work with people in developing countries to help them improving the living conditions

A number of the Pacific Islands are volcanoes that have pushed up from the ocean floor, the others are the tops sunken mountain ranges

To be successful in an interview, you should control the feeling of pressure and making a good impression on the interview

Choose the correct answer to complete the sentence.  "In the polluted environment, _______ diseases can be passed easily from one person to another"

Nitrogen must be combine with another element such as Hydrogen or Oxygen to be useful in agriculture or industry.

The biologist found some pollutants, a little of which can be considered very harmful to fish and other living organisms in the river.

From the airplane, passengers are able to clearly see the outline of the whole island

Harry has been admitted to ..........School of Medicine at .......... Midwestern university. 

The organizers of the charity were more than surprised at how many people lined up to receive the clothes donating by the outdoing mayor.

Pele encourage Ronaldo to take part in 2012 World cup.

An escalator is a moving stairway that transporting people from one point to another by means of linked threads

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

The early periods of aviation in the United States was marked by exhibition flights made by individual fliers or by teams of performers at country fairs

The bold way in which Margaret Mead defined the terms “family” – based as much on choice as on biological relationship – is possibly the most enduring of her legacies

Choose the correct answer to complete the sentence. "Scientists predict that by 2030, the rainforest will have ______ smaller by 40%. "

The amount of books in the Library of Congress is more than 58 million volumes