To COVID-19 from , people had better not go to the crowded places.

Everyone loves a good mystery. For thousands years, Cretan mazes(克里特岛迷宫)have confused us.

There are many different (idea) about why they first appeared. From the outside-a Cretan maze looks like any other. There is only one path (follow), but it's possible to get lost! The earliest example of this type of maze is on a clay tablet (泥板) made in Greece. , the most famous was built on the island of Crete. The ancient Greeks believed that there was. monster in the first Cretan maze. It was half-man, half-bull, and like to eat humans. Every few years 7 boys and 7 girls (send) into the maze, where the monster killed them. Eventually, a brave prince (王子) (call)Theseus killed the monster.

This is a good story. But it's just a legend. Today, Cretan mazes (be) all over the world, and still seem (mystery). Whether you believe the story or just admire (it) as pretty works of art, enjoy the fun they bring!

Look! The policeman could after the thief.

Men have always wondered about the earth they live on and about the sky above them.

When early man looked at the night sky, they asked themselves a lot of questions. They looked at the moon, and wondered what this strange bright object in the sky was. They did not understand why it changed its shape from night to night. They looked at the stars and planets. They also wondered why some of them changed their positions, while others did not.

They also thought about the shape of the earth. Most early people believed the earth was flat.

In different parts of the world, there were different ideas about the universe. The ancient Greeks were the first people to study the universe more scientifically. In the sixth century BC Pythagoras put forward the idea that the world was round. However, he could not explain why people at the bottom of the world did not fall off.

It was not until the sixteenth and seventeenth centuries that scientists found the answers to some important questions. With the help of Galileo's telescope, people could see the sky more clearly, and find the positions of the stars and planets. Finally in 1665, Isaac Newton explained to the world what gravity (重力) was and people at last understood why they did not fall off the earth.

The old man's wish was to letters his son often.

A teacher wanted to show his ideas to the students more ,so he gave an example in his class.

He took out a large glass and said," OK, time for a game. "Then he put some stones carefully the glass. When the glass was filled to the top and no more stones would fit inside, he asked," Is this glass ?" Everyone in the class answered," Yes. "

Then the teacher said," Really?" He reached under the table and pulled out a bag of sand. He put it in and the glass, causing the sand down into the spaces among the stones. Then he asked the students again, "Is this glass full?" This time the class was not so . "Probably not," one of them answered.

"Good!" he replied. He reached under the table and brought out a bottle of water. He poured the water into the glass and it went into all the spaces left between the stones and the sand.

Then the teacher looked at the students and asked," What can we learn from this game?" One boy raised his and said, "It shows us, no matter how full your plan is, you can always fit some more in it if you try really hard."

"Wonderful!" said the teacher." But that's not the point. The truth the game shows us is this: If you don't put the big stones in , you'll never get them in at all. "What are the big stones in your life? Maybe the things you love or the things doing. So whenever you think of this game, ask yourself this question," What are the big stones in my life?" to do these things first of all.

From the example above, his students understood him well.

The early 1500s was an exciting time of exploration and discovery. During this time, a young nobleman named Ferdinand Magellan became excited about the idea of exploring new lands.

Magellan told King Charles I of Span his plan to look for the Spice Islands. . In 1519, Magellan and 240 men sailed from Spain in five ships: Concepcion, San Antonio, Santiago, Trinidad, and Victoria. He sailed along the coast of South America looking for a place to sail through to the other side of the land. He found a passage near the tip of South America. This passage led from the Atlantic Ocean to another ocean. Today this passage is called the Strait of Magellan. Magellan named this other ocean the Pacific Ocean, because the waters were so calm.

, he had only three ships left. The San Antonio had recently sailed back to Spain. The Santiago had been wrecked in a storm.

Magellan expected to find the Spice Islands soon after entering the Pacific Ocean. But the three ships sailed west day after day. Many sailors died of hunger or disease. Finally, they reached the Philippine Islands.

, he is known as the first person to sail around the world. It was his voyage that first proved(证明)that the Earth is round.

A. It was here that Magellan was killed in 1521

B. By the time Magellan reached the Pacific Ocean

C. The king agreed to give Magellan ships and supplies

D. Although Magellan did not live to complete the voyage

E. Magellan sailed across the Atlantic Ocean to South America