The earliest maps were probably drawn in the Middle East. Some of these maps have1and they show us the people at that time thought the earth flat(平的).As time went by, the pictures became more detailed and maps were more2made. Later on, ancient Greeks(希腊人)used their3of math and science to make maps. Greek maps tell us the Greeks knew the world was 4.

    From simple pictures, mapmaking has turned into a science. Maps are made5 surveying(勘测)land. In the1900s, people around the world started to share information to make6maps. With the help of the photographs taken from the sky and space, maps are now more exactly made than ever.7the world is always changing, we will always need new maps.

    There are many types of maps, but almost all use8and pictures to describe what a place is like when the map is made. A map usually tells what the pictures 9. Some maps may show the whole world. A road map will help you know the10from one place to another. Other maps may use pictures to show the temperature and population in different places.

    Hello. We are students from Thailand, and we want{#blank#}1{#/blank#}(save) the elephants. The elephant is one of Thailand's symbols. Our first flag{#blank#}2{#/blank#}(have) a white elephant on it. This is a symbol of good luck. Elephants{#blank#}3{#/blank#}(be) smart animals. They can play soccer or music. They can also{#blank#}4{#/blank#}(draw) very well. People say that "an elephant never{#blank#}5{#/blank#}(forget)". Elephants can walk for a long time and never get{#blank#}6{#/blank#}(lose). They can also remember places with food and water. This{#blank#}7{#/blank#}(help) them to live. But elephants are in great danger. People cut down many trees, so elephants{#blank#}8{#/blank#}(lose) their homes. People also kill elephants for their ivory. Today there are only about 3,000 elephants (over 100,000 before). We must save them and not buy things{#blank#}9{#/blank#}( make) of ivory. Let's{#blank#}10{#/blank#}(remember) that March 13th is Thai Elephant Day.

As the weather gets warmer，there are few things that are better to do than travel．But traveling might not be that fun for everyone，especially for those who have motion sickness（晕动症）．

Motion sickness is also called travel sickness．It is a common experience for many people．Depending on how you travel，it can be called carsickness or seasickness．People with motion sickness feel very uncomfortable while they are in motion．They feel sick and dizzy，like the room around them won't stop spinning．

It is generally believed that motion sickness happens when your senses become confused （困惑的）with each other，Scientific American reported．

We use different parts of our body to sense movement．Our eyes tell us if we are moving．The inner ears （内耳） contain a special liquid that helps us sense our direction and balance．Our muscles react to movement．

When you move around，these body parts work well together．But when you are in a car or an airplane，they get confused．Your inner ear signals that you're moving．This mismatch gives us motion sickness．

But some people are less sensitive to motion sickness．This may be because they have certain genes （基因） that prevent mismatching senses，Bethann Hromatka，told the Atlantic．

Although there are many ways to deal with motion sickness，scientists believe that the key is to simply try to adapt to it．For example，some astronauts do special exercises that give them mild motion sickness．After a week or two，the astronauts become used to it and don't feel uncomfortable anymore，a NASA flight doctor，told the BBC．

The Internet is one of the greatest inventions in human history.However，this great invention has some problems.Everything you do online leaves a small track（痕迹）.

Some people make use of the information you are providing for the Internet.How should you make your work online safer？There are a few steps.

Cover your tracks.Whenever you visit a website or a small file，a cookie（网络跟踪器） is marked in your browser（浏览器）

So what's the harm in the cookie？Well，bad people can use the information stored in your cookies to steal your passwords for some sites.So cut out all the cookies you have left as soon as you finish your work online.

Use the latest browsers.The main browsers，Chrome，Internet Explorer，and Safari are all built to be safe enough，but the people who create the browsers are not perfect and may make mistakes.It's common for a safety problem to come out with a browser.

Usually these problems are worked out very quickly，but it's important that you make sure your browser is up to date.In fact，new safety patches（安全补丁），but you need to make sure you have them.Turning on automatic updates（自 动升级） is the smartest choice.

Any technology has two sides.So we should be smart enough about them.

Do you know the lion dance? It's part of traditional Chinese culture. People often perform in the night 1 the Chinese New Year. They also perform it for other happy occasions（时刻）. The lion dance is believed to 2 good luck and success. 

There are many different stories about how the lion dance 3 . One of them is like this! Hundreds of years ago, a monster called Nian came to a village in China. The villagers were 4 . Luckily, a lion chased（追逐）Nian away. A year later, Nian came back again, 5 this time the lion couldn't help. The villagers had to 6 themselves. Their "lion" danced, jumped and chased Nian away. For this 7 , people began to perform the lion dance before the Spring Festival to chase bad luck away. 

There are two different kinds of lion dances. In the southern lion dance, the dancers try. 8 to perform like a real lion. Their "lion" may shake its body. The dance can be funny. The other kind is the 9 lion dance. It has more martial（军事的）art skills like rolling and jumping. Both the southern and northern kinds are very interesting to watch, but it takes a lot of 10 to perform well. Both kinds are considered to be traditional performing arts of China.