The Port of Shanghai has been the busiest in the world for 14 years running after     1     (overtake) the Port of Singapore in 2010. The seaport, situated at the mouth of the Yangtze river,     2     (grow) to cover an area of 1.5 square miles since it was opened in 1842. From here, 500 million tonnes of goods is handled in a year. There’s enough space at Shanghai to receive this huge shipment, most of     3     consists of coal, steel and machinery.

The Chinatown in San Francisco attracts     1     (crowd) of visitors each year. The climate is mild all year round, thus     2     (ensure) that it is always a good time to visit the Chinatown.

Keep your eyes open, and you will be astonished     3     (find) the fascinating sights, customs and traditional Chinese culture in real life, such as games of Chinese chess and people practicing tai chi in peaceful     4     (surround). The stores there offer a unique range of goods as well as clothing. There are Chinese tea shops, where visitors are permitted     5     (consume) various Chinese tea. But it has been confirmed     6    many tourists are thrilled to see its traditional dishes from all over China.

On March 31, the Eiffel Tower celebrated its 130th anniversary since it opened.     1    (original) planned to last only 20 years, the people of Paris wisely decided to keep it standing,    2     (recognize) its importance. Millions of people     3     (visit) the tower so far, according to its official website.

The tower was created by the French engineer Gustave Eiffel and was first intended as the main entrance     4     the 1889 World’s Fair. It was built in a little over two years and faced criticism from some locals initially. However, it quickly captured the attention of fair visitors, attracting more than two million people. It also had a     5     (practice) use as a radio antenna during World War I.

Visitors today can choose to climb 1,665 steps or take one of the original elevator cars    6     (reach) the top. At the top of the tower,     7     the tower’s administrative office is located, guests can enjoy a drink at the champagne bar on the top floor.

Today, the Eiffel Tower is a symbol of France, representing a feeling of pride and thankfulness. It is a global icon that can bring together people from different     8    (background). The tower is not only     9     popular tourist destination but also a widely recognized symbol, a     10     (believe) held by many who appreciate its enduring charm.

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,     1     (come) and going, like clouds in a strong wind in the United States, a man in Boston was using the telegraph to speak to a man in Portand 160km away. They both turned off the electricity for the telegraph, but     2     could still speak to each other for the next two hours. The electricity was coming from the light in the sky. How was this possible? And what was the light in the sky?

The light is called the aurora. Usually, you can see it only at the very north of the earth,     3     it is called aurora borealis or Northerm Lights, or at the very south, where it is the aurora australis or Southern Lights. But in 1859, something happened in the sun — a very large storm — and it moved the aurora across the middle of the earth. We do not think that his ever happened before 1859, and we know that it     4     (not happen) since then.

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     5     (call) the ‘solar wind’( wind from the sun). We cannot see this wind, or touch it. It is a wind of particles that travel away from the sun at the time at about 400 kilometers a second. Most of the particles never touch the earth. The earth has a kind of ‘wall’ around it that defends it     6     these particles. This wall is called the earth’s magnetic field, and it pushes the particles away on either side. But the earth's magnetic field has two “windows” in it: the magnetic north, and the magnetic south. At these places. the earth’s magnetic field turns down into the earth. And some of the particles from the solar wind come through these magnetic ‘windows’. These solar particles crash is to the particles that are already in our sky. And     7     this happens, we see the beautiful lines or clouds of light of the aurora.

Alaska is a good place     8     (see) the auurora borealis, and you can also go to places like Iceland, Siberia, the north of Greenland, Norway, Sweden, and Scotland to see the aurora australis, go to the south of Australia, Tasmania, or New Zealand.

People travel thousands of kilometers to see the aurora, and they can never be sure     9     it will happen. But     10     do see it says that they will never forget it.

When you are going to visit Beijing, it’s likely that you’ll want to visit the Tiananmen Square.     1     square is impressively big and is located to the north, separating Beijing from the Forbidden City. The Forbidden City is a breathtaking palace complex (建筑群) that     2    (house) the palace museum and was formally the Chinese royal palace from the Ming dynasty to the end of the Qing dynasty. Covering 178 acres, the Forbidden City is made up of 980 buildings.

The Temple of Heaven, including Lama Temple (Yonghe Temple), the Beijing Temple of Confucius and Beijing Zoo,     3    (recommend) as well. Lama Temple is one of Beijing’s most attractive and best-preserved     4    (temple). The zoo is one of the oldest in China,     5    (date) back to 1906, and is home to a great variety of animals.

The Great Wall isn’t located in the city itself, but if you have made the trip to Beijing, you can’t leave     6     going to see it. There are many organized tours from Beijing     7     will take you to the Mutianyu Great Wall. If you don’t want     8    (sweep) away by big crowds in summer, visit the wall in winter. It will be     9    (extreme) cold, but you’ll have a better experience. It will be     10    (easy) to shoot nice pictures, too.

Sarek’s mountains used to     1     (cover) by vast sheets of ice. Around 9,000 years ago, this ice melted,     2     (leave) behind about 100 glaciers. In 1909, Sarek was made a national park to keep the land in its    3     (nature) state.