用所给动词的适当时态和语态填空，词数不限英语

用所给动词的适当时态和语态填空，词数不限英语
there ___________(be) about 80 pyramids (金字塔）in Egypt（埃及）。They _________ (build) thousands of years ago. Among them the Great Pyramid ___________(be) the biggest one. It _____________(make) of 2,300,000 huge stones. It __________(take) more than 100,000 men twenty years to build the Great Pyramid. No one knows how the Egyptians(埃及人）_____________(lift) such huge stones without modern machines.