Where weredominoes (多米诺骨牌) from?Modern dominoes first showed up in Italy during the 18th century. But it isbelieved that the earliest dominoes were Chinese playing cards. Italianmissionaries (传教士) in China may have brought the gameto Europe. Do you think so?

    Do youlike to play with dominoes? Dominoes are small rectangular (长方形的) pieces made of wood orplastic (塑料). People can place dominoes in differentshapes. Then, they push one domino down and the rest of the dominoes fall oneby one. It is interesting to watch.

    Butplacing dominoes is hard. To make sure the dominoes fall smoothly, the spacebetween each domino is important. According to domino—play. com, if a domino is about 4cm long, then the space between two dominoes should be1—2 cm. If the space is too big, the dominoes will stop falling halfway.If the space is too small, the dominoes will fall too quickly and won't lookinteresting.

    Beginnerscan start by putting dominoes in a straight line. This is the easiest shape.Professional (专业的) playerscan place dominoes in many other shapes, including big circles, beautifulflowers and even famous paintings.

Think about the colors of fruit and vegetables: the red of tomatoes, the orange of carrots, and the purple of grapes.

You can eat fruit and vegetables of all colors—green, yellow, blue, purple and white. Each color is important to our health. These colors work together for our bodies.

Red gives us a healthy heart. Red helps improve our memory (记忆力). Yellow is good for our eyes. White can reduce (降低) cholesterol. Green is good for our eyes, too. It also gives us strong bones and teeth. Blue helps us keep a good memory as we grow old. It also helps our heart. So when you are buying or eating fruit and vegetables, remember to try fruit and vegetables of different colors.

Over the years, the way we carry food has changed. In the past, some food products like salt, sugar or flour were usually sold "loose (散的)" and taken home in bags. Thanks to modern technology, today a large number of packaged (包装好的) food products are seen in the market.

Food is packaged for different reasons. For example, canned products can be kept well, and the packaging can also help to improve the food safety. Other packaging is used so that some food can be easily carried, transported and sold. For fragile (易碎的) foods—such as fruit, tomatoes and cakes—they need to be packaged for the perfect condition when they reach the consumers (消费者).

Packaging may also cause several problems. First, packaging uses a lot of world's resources (资源). Hundreds of thousands of trees are cut down to provide paper and cardboard. And every year, millions of dollars are spent on packaging by food companies to catch the eye of consumers. As a result, people are likely to buy more food than they actually need. What can we do? Maybe we can ask companies to use recyclable materials for packaging. We hope to find better ways in the future.

Nowadays, computers and the Internet are playing an important part in our life. {#blank#}1{#/blank#} When you use the computers, you usually need to set passwords(密码). But not all the passwords are safe. How can you make your passwords safe? {#blank#}2{#/blank#}

First, use capital(大写) letters in your password. It will be difficult for others to get into your account(账户). It only takes a hacker(黑客) 13 minutes to work out a six- letter password made of small letters. {#blank#}3{#/blank#}

Second, use numbers and symbols in your password. {#blank#}4{#/blank#} Sometimes such passwords are not easy to remember, but they are really safe.

{#blank#}5{#/blank#} If you do so, hackers will guess your passwords easily. You should change your passwords about every 90 days. In that way, hackers won't guess your passwords.
 

Chinese people are famous for being hospitable(热情好客的) around the world. 

When you visit a Chinese home, you will receive a very warm welcome. The host will first make tea for you.{#blank#}1{#/blank#} Someone in the family will talk with you, never letting you feel lonely. {#blank#}2{#/blank#}

Chinese people always cook their guests(客人) a big meal. And they always ask the guests to eat first.{#blank#}3{#/blank#} They want to make sure that you are relaxed and eat like you're at home. When you are eating, the host often says, " {#blank#}4{#/blank#} Please eat more." Although you tell them you are full, they still put more food into your bowl. 

Being warm and hospitable is an important part of Chinese culture and tradition. Just as a saying goes, "{#blank#}5{#/blank#}".

 Some Ways for a Happier Life

 Here are some scientifically proven but simple ways to get happiness. 

★{#blank#}1{#/blank#}. 

 Whether lending a hand or offering a handout, giving to others can make you feel better. A study from the University of British Columbia found that people who spent money on gifts for others or gave to charity reported being happier than people who spent money on themselves. Volunteering can make you feel good, too. Giving your time to help others may lead to better health. 

★Listen to music. {#blank#}2{#/blank#} . 

 According to the research from the University of Missouri, it works well if you actively try to be happier when you' re listening. Scientists from University of London also found that people who listened to relaxing music are likely to look brighter than it actually was. 

★Keep a diary. It's really good to write down your feelings. {#blank#}3{#/blank#} . 

 Little things like a nice cup of tea, watching a pretty bird in the garden or a phone call from a friend are worth thanking, according to Californian researchers. 

★Go outdoors. Lots of studies have found being outside makes you feel relaxed. If it's a green space, even if it's just your local park, that's better still. {#blank#}4{#/blank#} . According to a University of Sussex and LSE study, researchers asked people to number their happiness levels on an app and being by the sea on a warm weekend day came out top. 

Write down another way to be happy. (no more than 10 words) {#blank#}5{#/blank#}