Egyptian Pyramids

Reading Comprehension text about Egypt and history of the Pyramids.
BUILT ABOUT 4500 years ago, the 80 or so pyramids in Egypt are the oldest human made structures in the world. Of these, the famous three at Giza, near Cairo, are the most impressive. Their construction is an amazing feat of technology. Yet no one knows for sure how they were built. The ancient Egyptians had only simple tools made of stone, wood and bronze. They had no cranes, computers, rock cutters or heavy earthmoving equipment.