In the future, more and more people will move to big cities. To prepare for this, cities are becoming smarter and more efficient     1     the help of big data (大数据).

The local governments     2     (collect) lots of important information already: there are sensors (传感器) that measure noise, pollution and traffic. This is known     3     “smart city technology”. In the future, this data will make our lives much     4     (easy) by helping us save energy and keep the city tidy. There might even be smart lamp posts which can clean the air, or robots that empty rubbish bins for     5     (we) when they are full. Experts believe that technology will change     6     cities look like. If self-driving taxis can use smart city data to find the best way to take you to your destination (目的地), there will be much fewer traffic jams and much more space for people to walk or ride     7     bike. People will     8     (probably) stop buying cars together. Smart city technology     9     (help) prevent traffic jams in the future.

In a word, some     10     (difference) will be found in the cities of the future. What kind of city would you like to live in when you grow up?

Hangzhou won its bid （申办）for the 2022 Asian Games on September 16, 2015. It will be the     1    （three）time that the Games are held in a Chinese city after Beijing in 1990 and Guangzhou in 2010.

Hangzhou,     2     well-known capital city of Zhejiang Province（省份）in the southeast part of the country, has a population of 8.9 million. It is a beautiful city     3     a long history and it is developing fast nowadays. Hosting（主办）the Asian Games will help the city grow even faster.

The Games will include 36 to 40 sports. Most venues（场馆）have already been finished     4     some others will be put into use one year before the Games. The Asian Games     5     (last) from September 10 to 25, when the temperature is around 20°C and it’s a perfect time for sports.

“It’s for sure that the event will let more     6     (visitor) enjoy the beauty and charm (魅力)of his amazing city. At the same time, more roads will be built and the underground subways will be added to make the traffic     7     (easy) and better. But the best part is that it will make     8     possible for us to watch world-class games close to our homes. ” Shao Lin from Hangzhou, told the reporter     9     (excited).

Hangzhou is trying its best     10     (get) ready for the big spots show. Hangzhou is waiting to see you in 2022.

Venice is considered to be one of the most     1     (beauty) cities in the world. It has been known as the “City of Canals (运河)” “City of Bridges” and “City of Water”. The city is made up of about 100     2     (island), 150 canals, and 400 bridges. There     3     (be) no roads in the city, so there are no cars. The only forms of transportation (交通) are on water and     4     foot. There are roads, a train station,     5     an airport at the edge (边缘) of the city. One of the famous symbols of Venice is a “gondola (平底船)”. Gondolas are still used today, though     6     (main) by tourists. All Venetian gondolas are painted black—it was a law that was passed in the     7     (sixteen) century. Most Venetians travel by water buses called “Vaporetti”. Venice has one of the world’s most famous bridges     8     (call) the Rialto Bridge, built in 1591.

Venezuela, a country in South     9     (American), means “little Venice”. This is because the early European visitors to Venezuela first met the local people who lived in homes built over the water, reminding     10     (they) of Venice.

As a foreigner, the first time I ate hot pot was in Chongqing, China. The hot pot restaurant was one of the largest and     1     (busy) places in the city. In the restaurant, hundreds of people were crowded into one large room. My friend and I sat at a table     2     (介词) a large pot in the middle. It was     3     (冠词) amazing experience. I     4     (real) couldn’t forget it.

Today’s the hot pot is one of the most popular forms of     5     (cook) in China and nearly every town and city has some hot pot     6     (restaurant). Some people might ask how hot pot becomes so popular. With a hot pot, you can     7     (put) in any food that you like. The same pot can serve any number of different meals to the people sitting around the table. Everyone can eat as much as they want and no one is left out. This     8     (be) one of the values of Chinese culture. Finally, not only does hot pot taste wonderful, but it is the perfect way to spend time with others. “

In China, people often joke that there’s no problem that a hot pot can, t solve. Over a hot pot9 people can talk about not just food, but friendship. The food may soon be forgotten,     9     (连词) the friendship will stay with us forever. Even today, I remember all the good     10     (time) I spent with my friends in Chongqing.

Shanghai is one of the     1     cities in the world. If you like sightseeing, you’ll     2     it. People’s Square is in     3     centre of Shanghai. There     4     birds, fountains and green grass in the large public area.

The Bund is     5     old Shanghai meets new Shanghai. You can see many old buildings when you walk along     6    . The Pudong New Area     7         many modern buildings. At night, these buildings light     8     the sky in every direction.

Yu Garden is a traditional garden with many beautiful buildings, bridges and ponds. You’ll love it     9     you enjoy history and natural beauty. You can     10     buy different snacks outside the garden.

Welcome to Cape Town!

Cape Town isn’t the capital city and it isn’t the l    1     city in South Africa either, but it is the most popular city. Every year, millions of t    2     visit Cape Town. From the beautiful beaches to great s    3     centres, Cape Town has something for everyone.

For outdoor or sports fans, Cape Town provides fantastic activities l    4     hiking and climbing. The beautiful beaches are good for water sports, including surfing. If you are brave e    5    , you can even try to go down into the deep sea and get eye to eye w    6     a great shark in the cage! But of course, it’s also a good choice for you to walk a    7     the wooden roads and enjoy natural sights around if you are not so brave.

The w    8     in Cape Town is pleasant. In summer, the local temperature is about 26°C. And remember mid­summer here is January! And the winter temperatures don’t usually fall below 10°C. Two of the main l    9     here are Xhosa and English. The population of Cape Town is about 3.5 million.

Cape Town is the city that has e    10    . It will make your vacation unforgettable.

Have you ever visited Longmen Grottoes（龙门石窟）or Yungang Grottoes? Around 1, 800 years ago, Chinese artists     1    （create）grotto statues（雕像）in mountains. Over the years, these statues have been through earthquakes, floods and wars. Now     2     the 21st century, however, they are facing much     3    （big）problems. Too many tourists go to visit those grottoes every year and this     4    （certain）does harm to the grotto statues. Do you know how?

According to a study, the CO₂ that visitors breathe out has made the air more acidic（酸性的）. Also, visitors bring in microorganisms（微生物）. Because of these, the grotto statues are in a     5    （danger）situation.

Behaving（表现）badly can cause harm to the grotto statues as well. Too many visitors touch the grotto statues and cause     6    （they）surfaces to change color.

When we visit the grottoes, we can often see a sign saying, “No Flash（闪光灯）!” or “No Photos!”. This is     7     the strong light can be bad for the statues, especially those with color. The light can make it easy for them to lose their color.

    8    （protect）those ancient cultural treasures, recently China has asked the workers who take care of those grottoes to control     9     number of visitors. And tourists are encouraged to book（预定）    10    （ticket）on the Internet and stay away from busy hours when visiting.