A、They built the pyramids with the help of ancient machines. B、They built the pyramids with only human labors. C、They built the

Some of the most interesting buildings in the world are the pyramids. Thousands of years ago in Egypt, kings built the pyramids. They used to build them as tombs. They thought pyramids would help them find life after death. They also wanted the world to remember them as important people. There are many pyramids along the Nile River. The largest is the pyramid of Khufu. It is made of 2,300,000 huge stones, most of which are higher than a person. It is about 144 meters high. To build this pyramid,100,000 men worked for twenty years.
    The people of Mexico also built pyramids. They didn’t build the pyramids for tombs. They used to build a pyramid and then build a temple on top of it. The pyramids of Mexico are not as high as those of Egypt, but they are big. Each pyramid has a stairway that goes from the bottom to the top. The biggest pyramid in Mexico is almost 2,000 years old. Scientist’s think it took 10,000 men more than ten years to build. On top they built a temple to the sun. The temple is no longer there, but people call it the Pyramid of the Sun.
    Scientists have studied the pyramids, but nobody can say just how the people of the ancient days built the pyramids and how they carried and lifted the huge stones. Each stone fits so well and they didn’t have our modern machines Z.