In our daily life, robots are often found to do work that is too dangerous, boring, difficult, or dirty. And we often see kids play with toy robots.

    But what exactly is a robot? There are some important characteristics(特征) that a robot must have. These characteristics might help you to decide what is and what is not a robot. It will also help you to decide what you will need to build into a machine before it can be considered as a robot. A robot has these important characteristics.

    Sensing First of all, your robot would have to be able to sense the environment around it. 

    Give your robot sensors (传感器): light sensors( eyes ), touch sensors (hands), chemical sensors(nose), hearing sensors(ears) and taste sensors (tongue).

    Movement A robot needs to be able to move around its environment.  It can move on wheels, walk on legs or be driven by small engines(发动机). A robot can move either the whole body or just parts of it.

    Energy A robot needs to be able to power itself.  Some robots might power itself with sunlight, some might with electricity, while others with the battery(电池). The way your robot gets its energy will depend on what your robot needs to do.

    Intelligence A robot needs some kind of "smarts". A programmer is the person who gives the robot its "smarts". The robot will have to have a certain way to receive the program so that it knows what it is to do.

Comic strips(连环漫画) are popular cartoons found in newspapers and magazines around the world. If you can think up funny dialogues, you are well on your way to becoming a successful comic strip writer. If you're also good at drawing, it will be much better!

Develop your characters(角色). Develop your characters and practise drawing them in different situations. Make sure that each has its personality, so that it's easy to tell who is who.

Make a quick sketch(素描) of your strip. When you have decided what is going to happen, work out how many panels you will need, and exactly what will be described in each panel. Stop in where the text will go, and what the characters will be doing. Use a ruler and a pencil to draw the squares. Use the pencil to draw in your images. Draw the speech bubbles, characters and any background of the scenes. Correct until you are pleased with your drawings.

Add the text. Many cartoonists just do this with a pen, but you might want to start with a pencil until you feel confident in your lettering abilities(能力).Make sure your text is very easy to read.

Ink (给……上墨) over the final lines of your squares, text and images. Be careful not to use the wet ink. When the ink is completely dry, run an eraser over your comic to clean up the paper and remove any remaining pencil marks.

Technology plays an important part in our daily life now. Yet not many of us {#blank#}1{#/blank#} how much we rely on it until we compare our lives to those in the past. There was no {#blank#}2{#/blank#} technology at that time，yet the items that people had were quite enough for them to live their lives.

Without necessary cooking tools, the people could still {#blank#}3{#/blank#} to make their food as nice as our food today. Animal parts were thrown away if they were not delicious. Others were cooked over the fire. However，everything they {#blank#}4{#/blank#} was taken from the forests around them.

"Happiness is a habit," says Talia Soen, CEO of Happy Things, a platform (平台) that helps you develop those habits through daily lives. "Many people think happiness is hard to achieve, but we want to make it easy to understand and teachable." she says, "Let's examine the habits of happy people."

The experience of joy is related to the good, meaningful life. Happiness can be found in the small moments of our daily lives. For example, showing thankful feeling has been proved to increase happiness. Take a moment to think about the help you receive from others and thank them deeply. It can bring great joy to your life.

Reducing stress can improve your overall happiness. It's not a good idea to worry about too much. Soen suggests that spending time in nature is helpful for stress reduction. Even if you don't have time or access to go outdoors all year round, you can feel better by listening to nature sounds. And a study has shown that people feel less stressed if they have two to five hours of free time every day.

"There have been several studies on happiness and exercise," Soen says. "Many studies show that our happiness levels are influenced by moving our bodies a little bit more." The exact reason remains unclear, but even short periods of exercise can achieve this. As Soen mentioned earlier, exercising outdoors can have a double influence.

Having strong social relationships, such as friends, family, or other meaningful connections, can contribute to happiness. These relationships provide support when you need it. A researcher says, "Happy people spend more time with their friends and family members and are simply around other people more often." So, why not have lunch with your family or reach out to an old friend?

As you can see, happiness is all around us as long as we develop good habits.

写作要点：

1. 表达收到来信的喜悦之情，对她学习英语遇到的困难表示遗憾。

2. 介绍暑假生活：（1）每日坚持体育锻炼； （2）经常看一些英文卡通片。

3. 针对如何提高英语阅读能力，至少提出两点建议。

写作要求：

1. 不得使用真实的姓名和学校名。

2. 可适当加入细节，使内容充实，行文连贯。

3. 字迹工整、语言精练、表达准确、条理清晰。

4. 至少80词 。

Dear Susan, 

How are you?

Best wishes! 

Yours, 

Li Liang

AI (人工智能) makes our lives easier and better. Let's see the amazing AI.