Located in the north-east of Italy, Venice is known     1     "The Floating City". It is made up of over 100 small islands,     2     are connected by waterways and bridges. Unfortunately, water is also putting Venice in great     3    (dangerous). Saltwater is     4     ( slow) damaging the bases of Venice's buildings. The Floating City is, in fact,sinking.

More problems     5     (cause) by floods, which usually hit the city each winter. But these floods could now be a thing of the past thanks to a new flood prevention project.     6     (lie) in the middle of a lagoon, Venice was often hit by seawater caused by rain and strong winds every year, which travels through the     7     (nature) gaps to Venice.Dozens of gates have been built to hold back the sea until now. Each of these gates is 20 meters wide, with     8    longest about 30 meters long. In the event of a big rise in the water level, the gates will be raised to separate the city from the sea.

But only time will tell whether this project is the right solution. The important thing is that action is being taken    9    (protect) this unique city for future    10     (generation). And if it works, it means a longer, drier future for Venice.

3 . Some Famous Libraries in the World

The Royal Library of Alexandria in Alexandria, Egypt is probably known as the largest and the most famous library in the ancient world. It is said that the ancient library was burned three times over the centuries. A likeness of the ancient library was built in Alexandria and was opened on October 16，2002.

Celsus Library was built in what had been a monument tomb of the governor of the Province of Asia, Celsus Polemaeanus in Ephesus, Turkey. It used to be the third richest of ancient times in the world，which had more than 12,000 works of art, but it was destroyed in wars, leaving some ruins. Even so, it is now still so world-famous for its beautiful structure that many visitors come to see it. There is a statue of Athena at its entrance as she is the Goddess of Wisdom. It remains delicate and appealing.

Bodleian Library is attached to Oxford University and mainly used as a research library. It is also a copyright library, which means it has a right to every book published in the United Kingdom. The library was designed by the architect, Sir Giles Gilbert Scott. Construction was completed in 1940.

The British Library was set up in 1973 and is one of the world’s greatest libraries. This library has PACCAR gallery of living and workshop of words. The sounds and images offer shows and different programs at the theme exhibitions. They also have a wide collection of stamps of the world which are on show for visitors. The library also offers events like music and discussions.

4 . Have you ever been into a cave? If not, please follow us and explore some of the most beautiful caves from around the world!

Marble Caves

Located in the center of Lake General Carrera, the Marble Caves in Chico, Chile, are only accessible by boat. The surrounding crystal clear waters allow visitors to see the rock formations beneath them while the rock ceilings above change color(depending on the writer levels and the season). The best time to visit: during sunrise and sunset, when the sun’s rays light up the cave walls, making it an experience to remember.

Reed Flute Cave

Reed F1ute Cave known as “the Palace of Natural Arts” is located in the northwest of Guilin in southern China.The limestone cave offers a grand fairyland of stalactites(钟乳石), stone pillars, stone curtains, birds, plants and animals in fantastic shapes and colors.

Fingal’s Cave

This incredible sea cave is located on the uninhabited island of Staffa in Scotland. The cave’s size, shape, and naturally—arched(拱形的) roof combine with the waves to create strange sounds that enhance its cathedral—like atmosphere.

The Blue Grotto

The Blue Grotto is the symbol of Capri. It is a sea cave found on the coast of the island and is a well-known spot to all who visit the area. This cave is unique for its brilliant blue light which comes from two sources: the entrance to the cave and a bigger hole beneath the entrance. When viewed from inside the cave, the entrance appears as a brilliant white light just above the waterline, while the underwater hole, which is the larger source of light, provides a blue light.

5 . Tiny Countries You Never knew Existed

Sao Tome and Principe off Africa's west coast is only 372 square miles, but it has Impressive, undamaged nature, rich in biodiverse species. The amazing needle-like volcanic peak Pico Cao Grande rises 1,000 feet into the air. The islands are home to only around 200,000 people today.

Only 23 square miles with a population of just 34,000, the little-known country of San Marino, surrounded by Italy, is the world's fifth smallest country. With the UNESCO World Heritage Site of Mount Titano, the country is said to be the oldest republic in the world.

Dominica covers only 290 square miles, with some of the best diving in the Caribbean, including the UNESCO World Heritage Site of volcanic Morne Trois Pitons National Park. In Dominica, you'll see rainforests, waterfalls, and coastal views. The island is also home to the only remaining population of the Kalinago, who are part of the island's 74, 900 inhabitants.

This Pacific island country 33 coral islands is 313 square-miles, but it's the only country in the world to fall into all four hemispheres (半球). The country's 109, 000 residents live in only 21 of the islands see this tropical paradise before it is no longer--rising seas are threatening to swallow the country whole.

6 . It's always adventurous and romantic to visit an island country. Take a look at some breathtakingly beautiful island countries in the world, which everyone should visit at least once in his lifetime

Maldives

It' s believed that Maldives is one of the most popular honeymoon(蜜月) places as well as one of the most beautiful island countries. Situated in the middle of the Indian Ocean, Maldives is made up of a series of ancient coral reefs that grow up along the sides of ancient volcanoes, with fascinating beaches

Fiji

Fiji has plenty of surprises for any adventurous traveler. It is famous for the worlds best surf scenes, attracting many surfing lovers to ride the great waves. Well, if surfing is not for you and you love sitting on the beach and relaxing, hiking or seeing breathtaking waterfalls, Fiji is also a suitable island country to visit

Malta

Malta, a beautiful southern European country in the Mediterranean Sea, has a rich history and culture. There are amazing sky-high cliffs to climb>, wonderful temples to visit and lots of amazing places to go diving. There are plenty of interesting things to explore here and everyone can find something to enjoy. The historic part of Malta is shown in its architecture. great walled cities, and many underground tunnels.