Mark: What do you want to do during you holiday?

Lily: I want to Egypt and visit the Pyramid of Khufu. Look at this picture.

Mark: how big the Pyramid of Khufu is!

Lily: Yes. It`s magnificent. More than two million stone blocks are used to build it, weighing an average of 2.5 tons each.

Mark: How did the ancient Egyptians do that? 4,000 years ago there was no machinery. How could they move such enormous blocks to build such a huge pyramid?

Lily: Maybe pyramids were built by skilled workers

Mark: Were they forced to build the pyramid?

Lily: Some history books said they were, but research says "No". In fact, they were proud to do the work.

Mark: Interesting!