【推荐2】When you read this sentence, the population of the earth has grown by 10 people.     1     .

Most of these new people are born in developing countries.     2    .

In the developed countries of Europe and North America, the population is growing very slowly. This is because women in these countries have, on average（平均）only one or two children.     3    .

In the developing countries, more than one billion people already live below the poverty line（贫困线）.     4     Children get little or no time at school and suffer from many kinds of diseases. The UN has that the world's population will reach 12.5 billion people by the year 2100. If the number makes your head spinning (眩晕), you're not alone. Many experts are worrying that so fast population growth could have very bad results.     5    

【推荐3】From Nov. 1 to Dec. 10 in 2020, if someone knocks at your door and wants to ask you some questions, don’t be afraid. They are working on the 7th national population census (普查). They will ask each family about their name, age, education and job.

China has a census every 10 years. At the first one, there were about 600 million people in China. Now China’s population has boomed. It was about 1.37 billion in the 6th census, according to the National Bureau of Statistics (NBS).

“The census is very important for every citizen (公民),” said Ning Jizhe, director of the NBS. “It will help improve infrastructure (基础建设) and public services.” For example, if the census shows that there are many children living in a certain area, the government will know that it should build more schools there. Scientists can also learn more about population growth from the census. In some years, the population grows faster than in others. Even in the same year, population growth is different in different places. Scientists can use the information to figure out what causes growth in certain years and places.

2020’s census is different from past ones in one important way. For the first time, citizens will be encouraged to use smartphones and other digital tools to record their information, Xinhua reported. When census takers knock on your door, they will offer you an account (账号) number and a QR code (二维码) that you can use to record your information.

【推荐1】Now a lot of families keep pets in their houses. Most pets are small animals such as cats, dogs, fish, snakes, birds and so on.

Dogs are the favorite pets. The second favorites are cats and the third favorites are birds. These small animals are very cute and friendly. People usually have them as their family members. They look after them very well. They let them wear beautiful clothes and their pets have nice names. They also give their pets nice food. They buy food for their pets in pet shops. They keep them clean every day. Pets are all very happy. Many pets have their houses and beds. They often go out to relax and take a walk with people in the park in the morning.

Some children like pets because they need a friend to play with at home. Many old people don’t live with their children, and they keep pets at home just because they often feel lonely (孤独的). They have them as their children and they love them very much. So pets are very important. I think every family needs pets.

【推荐3】① Everybody enjoys acts of kindness. But can you explain why? Some people think kindness is something out of love and care. While others believe it is just a tool that we use to become more popular. But research shows that being kind can activate (激活) an area of the brain called striatum (纹状体). Research also shows that kindness improves people mood. But why and how does it happen? Here are number of different ways.

② Being kind can make someone smile. If you see yourself smiling in a situation, people around may be smiling, too. This is especially true for your close friends and family. A kind act makes someone who is sad feel better. It can also make ourselves feel good, so why not set off that chain (链条) of good feelings to people around?

③ Secondly, being kind starts or develops a social connection with others. Kind acts like buying someone a present make friendships stronger. Research has shown that spending money on others may help you get a stronger feeling of happiness than spending it on yourself. Similarly, charities also open up new circles of people to connect with someone on the other side of the word.

④ In another recent research, even children in their first year of secondary school know how being kind makes them feel happy. If one person is kind, he or she make others in the group kind. It also lifts everyone’s spirits. Imagine that you make cakes for the office and it makes others do it each month. Then you’re getting cakes a lot more days than providing them.

⑤ The story doesn’t end here. Being kind may improve your mood, but research has also shown that if you’re in a good mood, you can act much more kindly. This makes it a wonderful two-way relationship, doesn’t it?

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