The Chinatown in San Francisco is the     1     (big) in America, and also the oldest. The climate is mild all year round, meaning     2     is always a good time to visit. Now, the majority of residents in Chinatown     3     (be) still   ethnic Chinese, many of whom do not   speak English     4     (fluent). This allows visitors     5     (experience) a real taste of China. Visitors can spend hours just     6     (explore) the interesting sights, smells,   and sounds of China. The stores in the Chinatown offer     7     unique range of souvenirs, goods, and clothing. All kinds of traditional Chinese herbal medicine can be found, too, and there are Chinese tea stores,     8     visitors can taste and buy varieties of Chinese tea.     9     perhaps what many tourists and San Franciscans treasure most about Chinatown is its food. There is Chinese food to suit everyone’s taste,     10     traditional dishes from all over China.

I wake up to the sound of the wind. Even though the sun is     1     (bright) shining,     2     (tell) whether it’s morning or night is impossible. I’m above the Arctic Circle,       3     in summer the sun never sets. I leave my tent and walk over to the mountain edge. Sarek’s mountains used to     4     (cover) by vast sheets of ice. Around 9,000 years ago, this ice       5    (melt), leaving behind about 100    6     (glacier). In 1909, Sarek was made a national park to keep the land in     7       (it) natural state. All new development is banned within park boundaries. After breakfast, I pack my bag and set out again. If today is anything like yesterday, it will be full     8     sweat and hard work to reach my destination. However, I can’t complain. Being in such     9     beautiful and wild place makes me feel     10     (bless). What could be better?

8 . Like many young people, Jessica wants to travel the globe. Unlike most of them, this 25-year-old is doing it _________. She and her husband have spent the last two years traveling the world, stopping everywhere from Paris to Singapore. It might sound like one long, expensive _________, but the couple has an unusual way to make their travel _________.

They’re part of a new form of the _________ economy (经济): an online group of house sitters.

Throughout their no-cost stays in _________ homes, they feed pets and water plants in the homeowner’s _________.

It’s not all sightseeing. The two travellers carefully _________ their trips, scheduling their days around the pets that are sometimes difficult to _________. But house sitting also offers a level of _________ they can’t find in a hotel. “It’s like __________ at a friend’s house,” Jessica says.

The couple has a high __________ rate in getting accepted as house sitters and they always go beyond the homeowner’s __________. For Jessica, that means __________ plenty of pictures of happy pets, keeping the house __________ and leaving a nice small gift before heading to the next house. “You want to make the homeowner feel that they made the right, __________” she says.

9 . Skiing in Switzerland: The Complete Guide

Switzerland, as the first place in Europe to develop winter tourism, has a long skiing tradition. A long ski season, excellent snow conditions, and large skiing areas make Switzerland a perfect destination for skiers from around the world.

• Saas-Fee: You can find plenty of English-speaking ski schools in Saas-Fee and lots of bunny slopes(初学者滑雪道) on which to master your turns. The beginner ski area is separate, so you can practice without getting in the way of other skiers.

• Grindelwald: Grindelwald is a great choice for those looking for a kid-friendly skiing experience. There are plenty of ski schools and several bunny slopes, such as the Bodmi practice area, which is fit for children. Once you’re ready to head up the mountain, about 30 percent of Grindelwald’s runs are rated blue, meaning they’re on the easier side.

Zermatt is home to the Theodul Glacier(冰川) where it’s winter year-round. With 13 miles (21 kilometers) of runs, it’s the largest summer ski area in Europe and attracts professional skiers looking to train year-round. The glacier slopes here offer attractive views and allow skiers to get a close look at the Matterhorn.

• Avoid the busiest time of year: Visit during the start or end of the ski season. Accommodation and lift pass prices are often higher over the winter holidays.

• Prepare your own meals: By renting a small apartment or home with kitchen facilities, you can save on dining costs by cooking your own meals.

• Enjoy the snow without skiing every day: Ice skating, winter hiking, and just having a snowball fight are all more affordable ways to enjoy the Swiss winter landscape.

10 . Over the last century, engineers all over the world have spared no effort to achieve the unachievable in bridge design.

Danyang-Kunshan Grand Bridge

No bridge is as long as the Danyang-Kunshan Grand Bridge in the world. The 164.8-kilometre-long bridge built in 2011 in China serves as part of the Beijing-Shanghai High-Speed Railway. The trip from Ningbo to Jiaxing that previously took 4.5 hours has been reduced to two, thanks to this bridge.

Rio-Niterói Bridge

Completed in 1974, the Rio-Niterói Bridge in Brazil is the second-longest bridge in all of Latin America connecting the cities of Rio and Niterói across the Guanabara Bay. The Rio-Niterói Bridge is technically known as a “box-girder (箱形梁)” bridge, made of special concrete. It receives an astonishing 140,000 (or more) vehicles per day.

Hartland Covered Bridge

The Hartland Covered Bridge is the world’s longest covered bridge. The 1,282-foot-long bridge was opened in 1901 and has been on Canada’s list of National Historic Sites since 1980. Although it was originally built without a roof, the bridge was capped with wooden materials during the repairs in 1921.

Jiaozhou Bay Bridge

The newly-built Jiaozhou Bay Bridge in China was named “world’s longest bridge over water” by Guinness Book of World Records in 2011, a title previously held by the Lake Pontchartrain Causeway. The dispute was settled when the title of “longest continuous bridge over water” was given to the causeway, with the Jiaozhou Bay Bridge receiving the title of “longest bridge over water”.