The pyramids were built around 2560B.C.The largest one of them is the Great Pyramid of Khufu. It's one of the Seven Wonders of the World .The King, Khufu, built the Great Pyramid as his tomb. show that it 1000000 people over 20 years to complete it .

    The Great Pyramid wasa unique building in the 19^th century A.D. At that time it was still the  building in the world .According to  research, the ancient King ,Khufu ,ordered his men to build the Great Pyramid stone by stone .The biggest stone as much as 15 tons .Each stone was fixed so well, though the ancient workers didn't have any modern tools .The Great Pyramid has four sides and each sides is 230.4 meters and 146.5meters high. At that time, there were no modern  or equipment, so how did the ancient people build the Great Pyramid? To this day, it still a mystery .But many scientists continue to study their .The completion of the Great Pyramidthe achievements of ancient working people.

A：Good morning, Dad. Are you free now?

B：Yes, my child. What's up?

A：

B：No problem! Let's go now.

 (An hour later, they get to the Science Museum.)

A：Hurry up, Dad! Wow! Great!

B：Shh! Be quiet, my child.

A：Sorry. Can I take photos?

B：I'm afraid not. Look at the sign “No photos”.

A：OK. Let's go upstairs.

B：Good. Oh, there aren't many people in this hall. I want to smoke to have a rest.

A：No, you can't smoke here, Dad.

B：Yes. Then, where can I smoke?

A：What a pity! All the halls are non­smoking areas.

B：OK. I won't smoke.

A： You'd better give it up.

B：Thank you, my child. I'll think about it.

    China Science and Technology Museum was opened to the public in September 1988. But the second project was completed in May, 2000. Its main task is to spread knowledge of science and technology among the public.

    The activities of China Science and Technology Museum include popular science exhibitions, Astro­vision film shows, training education programmes and experiment exhibition programmes. The museum has an area of 40，000 square metres, of which 16, 000 square metres is for exhibition halls.

    The Astro­vision Theatre is one of the museum's major attractions and also one of the largest Astro­vision theatres in the world. It makes visitors feel they are in actual events rather than see a film. Many great science activities are often held at the museum, and the museum wants to be an important window to the world.

    In Germany, there is a special museum. It is the only one of this kind in the world and few people know it. Every year，the number of people who come to visit the museum is only one thousand. What kind of museum is it?

    It is a museum about taxes (税收).In this museum，you can see the history of taxes and all kinds of taxes in different countries in the world. After visiting the museum，people can draw a conclusion(得出结论).That is from 3000 B.C.(公元前)，the kings，dictators(独裁者)and finance ministers(财政部长)could tax people freely. They taxed people heavily because of such things as wars，weddings(婚礼)or road building. They needed money and they got money by taxing their citizens (公民).In the early times of Egypt，farmers had to pay heavy taxes if the water level(水面)of the River Nile rose. The kings said that if the water level rose，there would be much more earth in farmers' fields. So the farmers could get a good harvest and they should pay more taxes.

    A strange kind of tax—Window Tax appeared(出现)in England. It lasted more than one hundred years. How? If there were more windows in the wall，the people must pay more taxes. So in those years, people built as few windows as possible in the wall.

    Russian people once paid a tax for their beards (胡子).The people who had paid this tax would get a special piece of paper. But what about the people who didn't pay for their beards? Of course，their beards would be cut. But without a beard for a man is a way to scorn(蔑视)God. He would also be punished.