XBOX 360 Kinetic, RoboSapien, WiiParty, theseare just a few of the modern toys sold in recent years. But some of the most populartoys are actually quite old.

Gameshave been around for thousands of years. In 4000 B. C, Babylonians played a boardgame that was similar to chess. Yo-yos made of stone were first used in ancientGreece around 1000 B C. And kites appeared in China around the same time.

    Another famous game is Scrabble. It was inventedby an architect in the 1930s, but it didn't get popular until 1953 And since then,more than 100 million sets have been sold worldwide.

    As you can imagine, toys and games are a multi-billion-dollarindustry. Mr. Potato Head, the first toy advertised on TV, grossed more than $4million in its first year. Play-Doh made its inventor Joseph McVicker a millionaireby his 27th birthday, while Mattel sells 1. 5 million Barbie dolls each week (that'stwo dolls each second!).

    Some toys go out of fashion, but then becomepopular again, such as Rubik's Cube. Research says parents are increasingly choosingto buy toys they remember from their own childhood.

    These days, toys are not just for fun. RoboSapienis a remote-controlled robot that was launched in 2004. He can walk, turn aroundand do other poses. RoboSapien was designed by Mark Tilden, who once created robotsfor NASA space missions. He expected the toy to be used mostly by and scientists,but almost 2 million RoboSapiens have been sold worldwide since its launch as atoy?

    Fancy a game anyone?

How do you feel when a teacher says it's time for a test? Do you get worried about it? Look at the next test skills （技巧）!

☆Go to class on time and do your homework carefully.

In this way, you will learn the lessons, such as Chinese, English, maths, and so on. You won't have so many worries.

☆Relax and go to bed on time.

After you finish your lessons in the afternoon, you need to relax in the evening and sleep well at night.

☆Get ready well.

You may take paper, a pen, pencils, an eraser, a watch, and books or a dictionary with you.

☆Read the questions carefully.

You must read the questions carefully before you answer them, or you will make mistakes.

☆Breathe （呼吸） deeply.

When you feel worried, put your pencil down on the table, close your eyes, breathe deeply and count numbers to 10. In this way, you will feel relaxed and you can do well in the test.

① Do you have a dog? What can your dog do for you? Do you know that dogs can read our feelings? Now some people find that dogs can smell (v.闻到; n.嗅觉) people's stress (压力).

②Dogs really are man's best friends. They have special smell. A new study said that dogs can smell if people are feeling stressed. Teachers at Queen's University, UK, made the study. They got breath(呼吸)and sweat(汗) from people both before and after doing a hard maths problem. They looked at the people's heart rate (心率), blood pressure (血压) and stress feeling in the study. Dogs can smell the difference in breath and sweat from people. Then they can know when people are stressed.

③The finding is wonderful: the dogs found stress in 675 of the 720 people. It could be 93.75% right! Australian News reported. The study's writer Clara Wilson said, "stress can change people's breath and sweat. Dogs are very good at smelling these changes." In the study, she also said, "this finding helps us learn that how dogs may know people's feelings."

④ This finding shows how special the bond is between people and dogs. The finding also tells us that dogs are very clever. And maybe dogs can help stressed people.

The Chinese cheongsam, also known as qipao, is a traditional dress that first appeared in the early 20th century in Shanghai. It has become a symbol of Chinese culture and is worn by women around the world.

The cheongsam hugs the curves(曲线) of the body and is mostly made of silk or cotton. It's typical with a high collar(领), short sleeves(袖) and a short cut on the side of the skirt to make movement easy.

The cheongsam was first worn by wealthy women in Shanghai as a way to show their social positions and wealth. But it quickly became popular among all classes of women as daily clothes. During the 1920s and 1930s, the cheongsam experienced changes and became fitter and better designed with fashionable elements(元素). Nowadays, designers are creating new styles to follow modern fashion.

Today, the cheongsam is often worn for formal situations such as ceremonies, celebrations and cultural events in China. One of the most popular looks of the cheongsam is Anna Wong, a Chinese famous movie star. She often wears cheongsams on and off screen. Her look helps to make the dress win popularity in Hollywood and around the world.

The cheongsam is not just a symbol of fashion, but also of Chinese culture and history. It brings out that Chinese people can always keep up with  changing fashion over years.

The cheongsam has stood the test of time. It will continue to catch eyes of the public and give ideas to people for years to come.

请你根据以下内容提示，以"How to Be a Better Teenager?"为题，用英语写一篇演讲稿，在学校演讲比赛中发言。要点如下：（1）演讲目的；（2）针对演讲题目给出至少两点建议；（3）发出号召。

注意：（1）词数80～100词，短文的开头和结尾已为你写好，不计入总词数；（2）可适当增加细节，以使行文连贯；（3）演讲稿中不能出现真实姓名和学校名称。

How to Be a Better Teenager?

Hello, everyone,

It's my honour to stand here to give you a speech. 

Yours,

Li Hui

Have you ever imagined being able to communicate with your pets at home and have them understand everything you say？It sounds too good to be true，but scientists have started using AIto help communicate with animals. 

Professor Bake told Scientific Magazine that AI allows humans to use technology to watch and understand the sounds and signals animals communicate with so we humans can try to speak back to them. She said trying to communicate in animals' language could be better than teaching them how to use human sign language. AI is already helping us communicate with bats and bees. This could change what we know about these animals and our relationships with them. 

Professor Bake explained how Scientist Tovel had used recordings and AI to understand bats. "Bats have their own language. They often argue over food. They have different names，or 'signature calls'，" she said，mother bats lower their voice when speaking to their babies. Their voice can never be heard with human ears. But AI makes this possible because a computer can be trained to listen like a bat. "

Actually，AI has so far achieved a lot in this field. For example，the computer not only listens but also watches bees' body movement to understand what they are communicating. Bake said scientists now know how bees say things such as "be quiet" or "stop". Scientist Landlof even created a robot Honeybee that entered a bee's home and was able to communicate with other bees when it wanted them to stop doing something or fly.