One fresh sunny day, while I was swimming in the water, I felt something special going through my gills(鳃).It was a different kind of water. I also found many of my friends became sick. Some of them were dying. I was starting to worry because I didn't want to get sick or die. I was also thinking about what I should do to save my friends, so I decided to do some research for my underwater life.

    My research started. At first, I noticed there were many bottles, cans and other kinds of rubbish in the water. Then I went on… I got closer and then I tasted many different kinds of liquid(液体).(A)To my surprise, I noticed a man pouring some liquid into the water. Others also saw him doing so and they decided to follow him. I hated it! I wish I could have told them that it was killing us!

    I think it is so stupid for people to do this to the earth that they are living on! I can't understand (B)      they are doing this. Humans should stop throwing waste into the lakes or rivers. I want to have a normal life with my friends. People should stop being so selfish and care about the environment. If they do that, everyone will be fine and will have nothing to worry about. I suggest they follow my words. If so, I believe everyone will be able to live a happy life.

    Do you often use a cellphone? Do you take the subway to school every day? These items make our modern life easier. But do you know how we should behave properly while using them? The following suggestions might be helpful. For cellphone users

    Keep your voice down when you make a phone call in public. Shouting on the phone may make others feel uncomfortable. And you'd better not use it during an appointment（约会）.

    Stop sending messages or playing games with your cellphone at a dinner or a party. It's a good time to communicate（交流）with your family and friends.

    Don't make or answer a call while driving. It is not only very dangerous for both you and your passengers but also against the law. For subway passengers

    You are supposed to wait in line while buying tickets and getting on the subway.

    You're not allowed to eat, drink or smoke on the subway train. The smell and noise may trouble others. It's our duty to keep the train clean and tidy. Besides, smoking is bad for health.

    You can't take pets on the train. As we all know, animals may spread diseases（传播疾病）and get the train dirty.

    You'd better not lie across the subway seats even if the train isn't crowded. Offering your seat to someone who needs it is regarded as good manners.

Titles：Some etiquette in modern life

    May: I'm 35. I like shopping, but shopping with young children is not an easy thing. I have to look after them while I'm shopping. Shopping with my husband is not fun, either. I only go shopping with my husband when I need to buy something for him. If I look at dress for myself, he always says something like "the queue is too long" or "you don't need to buy that right now". I often go shopping with my friends. It's fun. I like shopping alone, too.

    Lisa: I'm 26. I like shopping very much, but I never go shopping at weekends. There are too many people in the shops. I don't like shopping with other people. It usually takes me a lot of time to choose things because I never buy the first things I see. I always look around other shops to find the clothes with the best price. I'm good at finding the best deals. I don't like buying food in small shops and street markets. I think food in the supermarket is fresher and cheaper. So I usually shop there.

Information Card

    On May 5^th, 2017, at Shanghai Pudong International Airport, China's first Homemade jet airliner(喷气式客机), the C919, took off successfully for the first time. It has taken about ten years for the scientists and researchers to make this Chinese dream come true. It's a pride of the whole nation. So far, more than 23 countries have already ordered 570 C919 planes from China. But we still have a long way to go before the C919 carries passengers by 2020.

    What's more, China is working on the new high-speed trains with the highest speed of 400km/h. It will be ready by 2020. Many countries, especially the ones in Central Asia, Southeast Asia, the Middle East and Eastern Europe, are planning to build high-speed rail lines or to improve their railways with the help of China.

    China has made great progress in both science and technology. And it makes a great contribution(贡献)to humans，too. All of these are changing the daily life of Chinese people，even of the people around the world.

    Don't be too surprised if you see a car going down the road without a driver in Beijing these days. {#blank#}1{#/blank#}Last month, Baidu began to test its self-driving cars on open roads in Beijing.

    {#blank#}2{#/blank#}Since then, companies like Tesla, Uber and Baidu have been working to produce and test their own self—driving cars.

    Self-driving cars are safer than regular cars. {#blank#}3{#/blank#}They can remove the stress of driving and allow disabled or blind people to get around more easily.

    {#blank#}4{#/blank#}In one test, researchers pointed a laser pointer (激光棒) at the car's sensors (传感器) while it was moving. The car mistakenly thought that the laser beam was in its way and slowed down or changed the direction.

    The software that is used to direct the cars may not be safe enough. {#blank#}5{#/blank#}When we use our computers or smartphones, they sometimes crash (崩溃) without any reason. But if this happened to a self-driving car, the result could be deadly. Improvements to the software could be a solution to this problem.