Archimedes and the golden crown

One day in ancient Greece, King Hiero asked a crown maker to make him a golden crown. At first, he was very 1 with it.

"It's a nice crown, isn't it?" he asked his men. Later, however, he began to doubt 2it was a real golden crown. "Is it made completely of gold?" he wondered. He sent it to Archimedes and asked him to find out the truth.

"This problem seems difficult to solve. What should I do?" thought Archimedes.

Archimedes was still thinking about this problem 3he filled his bath with water. When he got into the bath, some water ran over.  

"That's it!" shouted Archimedes. "I know 4 to solve the king's problem!"

Archimedes went straight to the palace to see the king. First, he 5the crown and asked the king for some gold of the same weight.

Next, he put two pots into two big bowls and filled 6pots with water. He put the gold into one pot, and some water ran into the bowl. Then he put the crown into 7pot. This time, even more water ran into the bowl.

"Look at this," said Archimedes to King Hiero. "A crown 8completely of gold displaces 9water than a crown made of gold and another metal. This crown displaced more water than gold of the same weight, so I'm certain that it is not 10made of gold. "

"The crown maker tricked me, didn't he? What a bad man he is!" shouted King Hiero. He then sent the crown maker to prison.

    "Who needs a {#blank#}1{#/blank#}(超市) if you have Taobao?" says Li Min, a writer in Shanghai.

    Taobao, China's largest {#blank#}2{#/blank#}(在线的) shopping site, has become an important part of Li Min's life. She buys everything on Taobao.

    A growing number of Chinese Internet users like Li have found the joy of online shopping. More women shop online than men. Clothing and household products are the most {#blank#}3{#/blank#}(流行的) goods online. {#blank#}4{#/blank#}(购物) online has lots of {#blank#}5{#/blank#}(优势). You can buy {#blank#}6{#/blank#}(任何东西) at home, and you can also {#blank#}7{#/blank#} (比较) the prices of the same {#blank#}8{#/blank#}(产品).

    You may question the security (安全) of online shopping. Don't worry. Unless you {#blank#}9{#/blank#}(收到) the products from the sellers and are satisfied with them, the shop owners will not get the money. You can also get your money back if you want to {#blank#}10{#/blank#}(返回) the products.

Hello, I am Mary. I live in Chengdu. It's sunny and cool in my city now. I'm studying at home. My parents are shopping. What's the weather like in your city? And what are you doing?

Look at the picture! You can {#blank#}1{#/blank#} some school things(学习用品) in it, some {#blank#}2{#/blank#} and pencils, two erasers and two dictionaries. The blue eraser is {#blank#}3{#/blank#}. Itˈs big. The green eraser is Lucyˈs. She is my good {#blank#}4{#/blank#}. We are in the same(相同的) school. This is my English dictionary. What {#blank#}5{#/blank#} the Chinese {#blank#}6{#/blank#}? Oh, itˈs Lucyˈs. My English {#blank#}7{#/blank#} is Mr. Brown. {#blank#}8{#/blank#} first name is Bill. He is a good teacher. We thank him(他) {#blank#}9{#/blank#} his {#blank#}10{#/blank#}.

Do you like taking a trip? Now many students like riding bikes to take a trip. But it may be dangerous. For your own safety (安全), do the following things. 

Wear a bike helmet because it can protect (保护) your head. Look for a helmet that is right for you. The best helmet can't protect you if it isn't right for you. 

Wear the right clothes. They can make you feel better. They can also protect you. Bright-colored clothes like white help people see you clearly--even in the nighttime. Don't wear dark-colored clothes like black or brown when you are riding a bike. 

Follow the rules on the road. Always ride on the right side of the road. Please first look behind you before you turn left or turn right. And don't ride too closely (接近) to the cars--the cars may stop and the door may open suddenly! Also, don't just listen to music when you are riding a bike. If you listen to music, you may not know there is a car behind you. 

If you follow these tips, you'll be safe riding on the road.