Students learn their lessons in class. In class, teachers teach them. Students sit in the classroom listening to the teacher. Is this the only way for students to learn? Of course not. There is another way to learn. That is, students can teach themselves. For example, if you cannot remember anything when you are doing your homework, you can look through（浏览） your book to find the answer. This is a way to teach yourself. And it's not a difficult thing. We can do it at any place and at any time.

    How to teach yourself? The first thing you must do is to read. Read something interesting. The second is that you must ask yourself questions. Many clever students often do this. The questions are about something you don't understand or you want to know more about. You can write down these questions. The third is to answer the questions yourself by thinking hard, by reading the texts or other books, and sometimes by asking other people. These are the ways of teaching yourself. And if you do these things for a long time, you can succeed（成功）in your study.

    Let me tell you something about sharks. Sharks are among the oldest animals in the world. There are over three hundred and fifty different kinds of sharks in the world. Most sharks are about two meters long and live in the oceans.

    A shark can smell something in the water, for example, the blood of animals. That helps them find their food. Sharks mainly eat fish, other sharks and plants in the ocean.

    Most sharks bite (咬)people by mistake. They think a person is a large sea animal. When the sun goes down or comes up, sharks are looking for food. So at these times people shouldn't go swimming in the ocean. Today people kill sharks for food and their skin. The number of sharks in the world is dropping fast.

    We are lucky to live in a rich country where we have many things. However, most of us usually {#blank#}1{#/blank#} (waste) some things.

    Electricity is one thing that we waste most. Lights, TVs, {#blank#}2{#/blank#} (radio) and other things are often kept on even when no one is using them. We should turn them off {#blank#}3{#/blank#} we do not need them. It takes  {#blank#}4{#/blank#} (little) than a second to do it. Anyhow, not wasting electricity saves money, because we do not have to pay for the electricity we do not use. The {#blank#}5{#/blank#} (two) thing that we often waste is water. Fresh water is precious, so it shouldn't be wasted. It is only a simple matter of turning {#blank#}6{#/blank#}a tap. I am sure everybody can do this {#blank#}7{#/blank#} (easy) if he wants to. Another big waste is food. My mother used to cook so much food that much of it was thrown away. I told her we had wasted so much {#blank#}8{#/blank#} (food). She thought I was right and now cooks mainly what we can eat.

    It is not right to be wasteful. I find there is a simple way of not wasting things. That is {#blank#}9{#/blank#} (use) only what we need. Do not touch what we do not need. {#blank#}10{#/blank#}this way, we can stop being wasteful.

    What do you usually do in your spare time? Chatting online is now a national pastime in China, especially among the post-90s and post-00s generation. To some people, however, online chats can seem like a kind of polite conversation. Yet hidden rules and standards do exist, as long as you take the time to look for them.

    Get to the Point

    When sending a friend request, include your real name and any other identifying information. Remember, everybody's time is precious. If there's something you want, cut right to the chase. Never send an "Are you there?" without any follow-up messages. The quicker that you get to the point, the more likely the other person is to reply.

    Send the Right Things

    Please send texts, not voice messages. It might be easier for you to speak than type, but what about the person on the other end? They may be unable to listen to a 59-second message right now. Also, never send personal information by voice message—it is hard to note down. Emojis, GIFs and memes can save the day when you find yourself in an embarrassing conversation, or words fail you.

    Try to Understand

    You can always judge a person's mood by their text messages. If the person you're talking to says "Good night" or "I'm going to take a shower." that's probably not what they're actually going to do, it is just an excuse to stop talking to you. If someone hesitates for longer than three seconds before saying "Yes", they probably really mean "No". If you receive these emojis from friends who are older, read them literally (照字面地) (as a smile, a wave or a laugh). For the post-90s and post-00s generation, however, they could be speechlessness.

    Have you ever considered starting a fitness program? Since exercise can reduce the risk of diseases, improve balance, help lose weight, better sleep habits and even make you confident, you should start a fitness program in the following steps.

    Test your fitness level

How many meters can you walk or run in one minute? How much time does it take you to swim 50 meters? What is your heart rate (心率)? The data (数据) of your fitness level can help you know what activities you need.

    Design your fitness program

You may have begun your daily exercise. But a personal plan helps more. First, you should have your fitness goals (目标). For example, what do you want to look like, to be slimmer or quicker? A balanced plan will help you start low, progress slowly, do right activities and even allow you to recover (康复) if you get hurt.

    Prepare things needed for sports

You need something practical, enjoyable and easy to use. It could be a pair of trainers, a volleyball or a bicycle. You can also download fitness apps (应用程序) on your mobile phone to measure distances, calories burned or your heart rate.

    Take action

Now you're ready for action. When you begin, don't always try tough tasks. Listen to your body and reduce exercise time if necessary.

    Monitor your progress

Test your fitness level again six weeks later. If you have achieved your goals, increase exercise time to continue improving.

Starting an exercise program is an important decision. By planning carefully and acting step by step, you can have good health.