The Lights of Aurora
On the night of 2 September1859, the dark sky over Europe and North America was suddenly full of light! The light did no come from the sun or the moon and it had a strange colour. The light moved across the sky,
The light is called the aurora. Usually, you can see it only at the very north of the earth,
Why does the aurora happen? And why can we only see it at the top or bottom of the earth? The aurora is made by something
Alaska is a good place
People travel thousands of kilometers to see the aurora, and they can never be sure
2 . Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.
The Mystery is No Mystery
The area of ocean between Florida, Puerto Rico, and Bermuda, known as the Bermuda Triangle, is the source of much mystery. Over the centuries, reports of ships and planes disappearing
The Bermuda Triangle covers a vast 700,000 square-kilometer swathe of ocean. Close to the equator(赤道)and near the United States, it is a particularly busy patch of sea with heavy traffic. According to Lloyd’s of London and the U. S. Coast Guard,
These days, new theories are being put forward, with a bit of scientific truth to them. Some have attributed Bermuda Triangle disappearances to explosive releases of methane (甲烷) gas,
The only problem with this theory is that scientists won’t be able to tell with much certainty if this is a factor
San Francisco is a great city, which was able to rebuild itself after the earthquake that
In 1848,America got California
It is those immigrants from different countries and cultures
China has many famed explorers. There was Zhang Qian,
Born in 1587, Xu Xiake grew up in a rich family. Yet he rejected the
“On the surface, Xu's travel can neither be classified as great affairs of state
Xu Xiake traveled across China for 34 years. Perhaps his
Heatable Brick Beds Warm NE China Homes
In northeast China’s chilly winter, getting into a warm bed is made possible by an ancient heatable brick bed that could date back more than two thousand years
The bed is made of bricks or other forms of fired clay with
The heatable brick bed is not only used as a bed, but also a living area for the family. People
Cusco is a popular destination for
Pico Island, the second largest of the volcano-born Azores, is one of the most hard-won wine regions in the world. By the 19th century, Pico’s wine industry was at its peak,
As the world’s longest man-made canal, the Grand Canal is a vast waterway system in the north-eastern and central-eastern plains of China,
The Grand Canal is a magnificent hydraulic (水利) project in human history.
The Grand Canal represents the
Standing on the edge of the mountain, I’m above the Arctic Circle, where in summer the sun is