Kids would love to have more money in their pockets. With the money that {#blank#}1{#/blank#}(make) by themselves they can buy the things they want. Actually, making money when you are a kid is much{#blank#}2{#/blank#}(easy) than you think. Here is a great method of making money for you, if you are a kid. It's dog walking.

    Don't try to do dog walking as a business if you are not{#blank#}3{#/blank#}(comfort) with dogs. However, if you love dogs, this can be a good {#blank#}4{#/blank#}(choose).

    Usually your customers are in the neighborhood. Ask dog owner {#blank#}5{#/blank#}(tell) you as much as possible{#blank#}6{#/blank#} their dogs and their habits. It's very important that you keep friendly with the dogs{#blank#}7{#/blank#}(bring) a treat to the dogs can help develop a friendship with them.

    You can charge 5 dollars {#blank#}8{#/blank#}a walk lasts 30 minutes. If a dog's owner wants you to walk{#blank#}9{#/blank#}(he) dog for an hour, you can charge 10 dollars or even 15 dollars.

    The only disadvantage of this method is that you have to deal with dog waste. Be sure to take{#blank#}10{#/blank#} bag and clean up after those dogs.

    Athens, the capital of Greece{#blank#}11{#/blank#}(know)as the birthplace of{#blank#}12{#/blank#}(west) civilization. Two thousand four hundred years ago, it was the world's most {#blank#}13{#/blank#}(power)city{#blank#}14{#/blank#} (build) such as the Parthenon on the Acropolis Hill were built during this period. Greece's best writers lived in ancient Athens. Their work has influenced other writers ever {#blank#}15{#/blank#}

    Language is always changing. In a society where life continues year after year with few changes, the language does not change either. The earliest known languages had difficult grammar but a small, limited vocabulary. Over the century, the grammar changed, and the vocabulary grew. For example, the English and Spanish people who came to America during the sixteenth century gave names to all the new plants and animals they found. In this way, hundreds of new words were introduced into English and Spanish vocabularies. Today life is changing very fast, and language is changing fast too.

     There are several major(主要) language families in the world. Some scientists say there are nine main families, but other scientists divide them differently. The languages in each family are connected, and scientists think that they came from the same parent language. About 3 percent of the people in the world speak languages that are not in these major families.

    Crown shyness(树冠羞避) is a mysterious natural phenomenon in which the crowns of some tree species do not touch each other, but get separated by a gap clearly visible from ground level. The effect usually occurs between trees of the same species, but has also been observed between trees of different species.

    There are many theories going around, most of which make sense, but no one has been able to prove without the shadow of a doubt why some trees avoid touching each other.

    In his 1955 book Growth Habits of the Eucalypts, Australian forester M.R. Jacobs writes that the growing tips of the trees are sensitive to abrasion(擦伤), which results in crown shyness phenomenon. This theory was also supported by Dr. Miguel Franco. Some experiments have shown that if trees displaying crown shyness are artificially prevented from swinging in the wind and touching each other, they gradually fill up the gaps between them.

    But while the above theory is arguably the most widespread, it's certainly not the only one. Some scientists have suggested that crown shyness is a mechanism to stop the spreading of leaf-eating insects. These pests have been known to work together and create structures that extend up to 10 cm off of tree branches in order to reach other plants, so the gaps are the trees' natural defense method.

    One Malaysian scholar studied many trees, but found no traces of abrasions, despite their clear crown shyness. Instead, he suggests that the growing tips of the trees were sensitive to light levels and stopped growing when they got too close to other trees. Plants are able to sense how close they are to other plants and in order to get more light, they give off some chemical element to stop other trees from growing too close.

    Whatever the reason, one thing is for sure: plants are more intelligent than people used to think.

    The printing press has a long history. It was invented in Germany by Joannes Gutenberg around 1440, and brought to England by William Caxton in the 1470s.Yet the basic technology of printing remained the same up to the end of the 18th century, requiring two men to operate a wooden screw press by hand, producing about 200 impressions an hour. The 19th century was the period in which this process was mechanised, automated, and made many times faster.

    A key moment in the development of mass newspapers was the development of the steam-powered printing press, adopted by the times in 1814. The new presses were able to print per hour around five times the number produced by the machines. The editor, John Walter, had the machines fixed secretly at night, so that when his printers reported for duty the next morning the majority of them found that they were out of work. The Times went from a circulation of 5,000 a day in 1815 to around 50,000 in the middle of the century. This was not caused by the steam press, but neither could it have happened without it.

    Later developments improved this effect: the Applegath machine achieved 5,000 impressions per hour, and the Hoe press, an import from the United States, reached to 20,000 impressions per hour. Increase in the speed of papermaking in this period brought down the cost of printed materials both for the producer and the customer. In 1896, the Daily Mail was sold at the cost of only half a penny, and by 1900 it was selling nearly 1,000,000 copies a day.

    If print production was completely changed in those years, then so was its distribution. The appearance of the steam railway meant that for the first time newspapers could be distributed across the country on a daily basis.

    Being able to take advantage of truly unlimited data is a smartphone user's dream, but everyone I've talked to about 5G is more excited about the usage unlocked by next - generation wireless devices. From smart home security to self - driving cars, all the Internet - connected equipment in your life will be able to talk to each other at lightning - fast speed with reduced delay.

    "5 G is one of those forerunners, along with artificial intelligence, of this coming data age," said Steve Koenig, senior director of market research for the Consumer Technology Association. "Self - driving vehicles are emblematic in this data age - they show application of data completely. With one single task, driving, you have large amounts of data coming from the vehicle itself, and a variety of sensors (传感器)are collecting a lot of information to model its environment as it moves. It's pulling in data from other vehicles about conditions down the road. There's lots of data behind that task, which is why we need the speed and lower latency ((延迟).

    AR glasses and virtual (虚拟的)reality headphones haven't yet been inside the mainstream, but tech companies are joyfully saying that such equipment will eventually replace our smartphones. With 5G, that could actually happen. This is notable because companies such as Apple are reportedly developing AR glasses to improve - or even replace - smartphones.

    Ericsson showed at February's Mobile World Congress in 2019 how smart glasses could become faster and lighter with a 5G connection, because instead of being weighed down with components, the glasses could rely on outside equipment for processing power.

    But don't get too excited. There's still a lot of work to be done in the meantime, including some necessary testing to make sure the radio plays nicely with basic systems and service construction so that 5G isn^'t concentrated only in big cities.

The Moon Festival is also known as the Mid-Autumn Festival. It is celebrated on the 15th day of the{#blank#}1{#/blank#}(eight) month of the lunar calendar. It's a day to get together with your relatives, admire the moon, and enjoy mooncakes. Here is one way to enjoy a Chinese Moon Festival—cook for the Moon Festival.

Treat your relatives and friends with mooncakes. No Moon Festival is complete{#blank#}2{#/blank#}mooncakes. You can buy them from a Chinese bakery or make them on your own if you have time. You will send them to relatives and friends as{#blank#}3{#/blank#} (present), so prepare enough mooncakes!

Make mooncake biscuits for a sweet treat. Mooncake biscuits aren't as well-known as mooncakes,{#blank#}4{#/blank#}they can still be a tasty dessert for the Moon Festival. They're cookies made from the same dough (生面团) as you use to form{#blank#}5{#/blank#}outside of the mooncakes. You need to wait for 1-2 days{#blank#}6{#/blank#}you can eat them.

Plan a dinner of tasty and{#blank#}7{#/blank#}(tradition) dishes. A Moon Festival dinner{#blank#}8{#/blank#}(offer) delicious for the whole family to enjoy. Think about how many people you{#blank#}9{#/blank#} (invite) over and start to plan your meal. Many families also choose to eat out for the Moon Festival in order not{#blank#}10{#/blank#}(make) a meal-it's up to you!