Now many people like to keep dogs as their pets. But how did dogs become humans' close friends?

    In some places of Europe (欧洲), about 10,000 years ago, some wild (野生的) dogs often came to human's houses to find food. The wild dogs looked different from the ones today. They looked like wolves (狼). At first, they felt ① frightened. They always stood and looked for a short time. Then they got the food and ran away. Sometimes the young dogs couldn't run fast and people caught them. People trained them and the young dogs grew up with the help of people. Slowly, the wild dogs became home dogs. They could make home safe when people were away. They helped people hunt (狩猎). They helped people keep warm on cold nights. ② Sometimes, they could smell and hear danger before people could. In some cold places, they helped people pull (拉) things people need.

    Now there are more than 400 different kinds of dogs in the world. And they look different from each other. The number and kind are growing all the time. Today, some people mainly (主要地) regard dogs as pets. In fact, dogs are really our close friends. We should protect them from being killed.

    The Clean Your Plate Campaign was set up by nongovernmental organizations, which urged people to save food by not wasting anything on the dining table and finish all the food on the plate. The campaign, launched on weibo, was soon joined by millions of netizens across China in order to control food wastage.

    A study show that the grain that people waste every year in China is about 50 million tons , enough to feed about 200 million people for one year.

    Nearly 750 restaurants in Beijing have joined the Clean Your Plate campaign against wasting food by offering smaller dishes, half dishes and assorting dishes to reduce waste, and encourage customers to take leftovers home.

    Now (1)         (share) the empty dishes after dinner is popular with many youngers, and they are proud of it.

    ⑵ Our government is trying its best to put an end to food wastage, and is taking the lead to save food.

    Sweden, a small country in northern Europe, takes up almost the same size as China's Gansu province. But it has earned the title of the country with best fame in the world recently. Sweden does really well on all the different factors(因素) we used to understand what people think of a country. The country is safe, beautiful, friendly and powerful in many aspects(方面)。

    Although it stayed as a neutral(中立的) country through world wars, Sweden is actually very strong in military(军事的) technologies. It was the first country to make stealthy warship that is hard to found by a radar(雷达). Countries like the US and China once bough Sweden's military technologies.

    Some of you must be familiar with IKEA, the world's largest furniture retail(零售商). In China, you can find IKEA in Beijing, Shanghai, Xi'an and many other big cities. The affordable price and modern design make it popular worldwide.

    When you want to listen to music, you may open QQ music. But many US teens prefer Swedish music service Spotify. Now Spotify has more than 100 million users.

    You may wonder why such a small country can stand out in so many fields, it is possibly because of its good welfare that gives people a safe and comfortable place to live. Moreover, Children can receive free education from kindergarten to university. This provides the country with many talented people.

    China and Westen countries may have different ideas about certain animals, but when it comes to pigs, we have somehow reached an agreement﹣that pigs are ugly, lazy, stupid and shameless.

    But the truth is that pigs do have some finer qualities(品质). Science long ago proved that pigs aren′t stupid at all. A research shows pigs are" mentally and socially similar to dogs". They like to play. They have good long﹣term memories. And they know the difference between those who treat them well and those who don't.

    There are lovable pig characters in cartoons too. Peppa Pig(小猪佩奇), for example, a UK television series (连续剧)that began in 2004, has now become one of the most popular cartoons in 180 countries and regions. The four members in the cartoons pig family teach children from all around the world about love, friendship, and the value of family, And in China, McDull, a young pig who works hard toward his dreams even though he keeps failing, have been a popular cartoon character since 2001.

    Perhaps these are the qualities of pigs to keep in mind﹣intelligence, cuteness and patience.

    "Dreams may be more important than sleep. We all need dreams." some scientists say. Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams are short films. They come to us over and over again. That may be because the dreamer is worrying about something. Dreaming may be a way of trying to find an answer. Sometimes we wake up with a good feeling from a dream. But often we can't remember the dream. Dream can disappear quickly from memory. Some people dream too much to sleep well.

    There has been a lot of talk about Chinese bicycle sharing recently. Shared bikes are nowadays becoming the centre of attention in our We Chat friend circle. Many of our friends post photos of themselves riding bikes, especially during the weekend in natural parks, and we can see people logging in and out of shared bike apps. But are people really drawn to(被....所吸引) the idea of exercise and green transportation all of a sudden?

    Some people have tried Mobikes lately, and they don't particularly like Mobikes. They think the first generation Mobikes, the ones without baskets, are designed for athletes. They are very hard to ride, and the seat is not adjustable(可调节的). Then, they tried the yellow ofo bikes. They are easier to ride than Mobikes, but they don't usually have baskets, and you need to enter the password by hand, instead of scanning a QR code and having the lock open automatically like with Mobikes.

    We appreciate that there are shared bikes on the roads. They have saved us a lot of time during emergency situations. And on beautiful, clear days, we do enjoy riding them outside the city. But from what we've seen in our friend circles, people have been giving them endless praises, while we still saw some obvious flaws (缺陷).

    In our experience, there has never been a unanimous(一致的) decision on anything in public opinion. It makes us wonder whether these people really like riding shared bikes or are just saying this to agree with others. When we asked them individually, a friend of us, Lisa, secretly told us she tried the bikes to fit in(融入朋友圈). She doesn't like bikes and finds city's roads too harsh for bike riding. But the only way to hang out with her friends was riding out of town together. To join in social activities, she had to pick up bike riding again. Another young man, Simon admitted that he started talking about and forwarding information(转发信息) on shared bikes to appear cool and fashionable to friends. He started paying attention when Mobikes firs launched(推出). These views will give us something new to think about when we ride these bikes again.