The popularity of Chinese video-sharing social networking service TikTok continues to grow among young people in the United States, especially teens and young adults.

The service lets users create and share short videos, many of     1     are within 15 seconds. The TikTok app offers a wide choice of sounds, brief parts of songs and special effects tools     2     (produce) a video. Videos often include popular songs from famous     3     (art) and TikTok has even helped begin the careers of new music stars.

TikTok     4     (consider) a competitor to video-sharing app Snap chat, as well as Facebook’s Instagram service, which also mainly interest young users with photos and videos centered     5     (large) on fashion, pop culture and humor.

Last year, TikTok was the     6     (two) most downloaded app from Apple and Google stores.     7     was said that people have downloaded the TikTok app 1.65 billion times.

While TikTok has continued to grow, some experts and parents have expressed concerns about videos     8     (appear) on TikTok that might be     9     (harm) to young users.     10     this reason, they urge parents to monitor what their children watch on TikTok and suggest that only those over 16 should have access to the service.

Around 1870, Argentina(阿根廷)was experiencing an economic boom, and the capital, Buenos Aires, attracted many people. Farmers, as well as a flood of immigrants poured to Buenos Aires,     1    （seek）jobs. But these jobs didn’t pay well, and the people felt lonely and disappointed with their new life in the city. As the unhappy     2    （arrival）mixed together in the poor parts of the city, the dance known as the tango（探戈舞） evolved.

Initially, the tango was a dance of the    3    （low）classes, which was danced in the bars and streets. Gradually, the dance    4    （spread）into the upper classes of Argentinean society and became seen as being more     5    （respect）.

In Europe at this time, intense interest     6    dance from around the world was beginning. Tango dancers from Argentina arrived in Europe on board the boats carrying beef from Argentina. They began to draw the interest of the public as they performed     7    （they）passionate dance in restaurants and cafes. Not everyone approved of the new dance, though. In fact. it raised a few eyebrows among the more conservative members of society,    8     found the tango a little too shocking. The dance did find enough supporters so that even the tango's many critics could not put     9    end to its spreading popularity.

The popularity of the tango continued to grow in many other parts of the world. Now tango festivals    10    （hold）annually in different parts of the world.

September usually marks the start of a new season. In the UK, people will tell you it’s “autumn”. However, across the Atlantic people tend     1     (use) both “fall” and “autumn” when referring to this time of year. Why does it have to be so     2     (confuse)?

Before both words came into     3     (exist) in the vocabulary, the seasons separating the cold and warm months didn’t have common names. The main work people did during the pre-winter period was harvesting crops, so it     4     (call) “harvest” in Old English.

Then, in the 1600s, more people left the farmland and moved into cities.     5     farming, the term “harvest” became less useful to citizens. Some English speakers needed     6     different name for the season. They knew     7     (leaf) fell from trees during that season, so people called the season “the fall of the leaf”, or “fall” for short.

But by the end of the 1600s, autumn,     8     came from the French word “autompne”, had been introduced in England and overtook (超过) “fall” as the standard term for the harvesting season. At the same time, some British were making their first voyages to North America. They     9     (bring) “fall” and “autumn” with them. Today, using both words to describe the season is     10     (unique) American.

The Mid-Autunn Festival, also     1    （know）as the Chinese Moon Festival, brings families together to celebrate the harvest under a full moon. The holiday is all about giving     2    （thank）and joyful reunions with loved ones.

The Mid-Autumn Festival     3    （take）place every year with the full moon that falls on the 15th day of the     4    （eight）month on the lunar calendar. The Mid-Autumn Festival's iconic（标志性）food are sweet，rich moon cakes that are     5    （usual）gifted among friends and family. Making your own moon cakes at home leads     6     an incredibly pleasant experience for family celebration.

Lantern making is a     7    （tradition）Chinese art that's kept alive in classrooms and at home craft table during the days before     8     holiday. It's a valued and widely-practiced children's activity that's really easy to keep alive at home. If you lack（缺少）time, it may be more convenient     9    （buy）a Mid-Autumn Festival lantern, rather than making it. Depending on your preference, you can either stay attracted to tradition     10     choose more modern design with some online shopping.

My friend had a chance to make a trip to Hong Kong    1     August 15, 2011. He had dreamed about     2     (visit) since his boyhood and it    3    (be) the first time that he had been there. The following was     4     he had seen.

Arriving there, he was    5    (impress) by its beautiful scenery and tall buildings. It is said that Hong Kong has the most skyscrapers in the world. Wherever he went, he saw many smiling     6    (face) there. People in Hong Kong were kind, generous, easygoing and ready to help others. Much to    7    (he) surprise, he saw that people there always kept order in public places.     8    crowds of people were waiting for the next train at the subway station, they were talking in such a low voice as not to disturb one another.

Chinese and English are their official languages. English is     9    (wide) used in governments, markets, service centers and other fields.Staying there for only a week was    10     good experience that he will never forget.