1.Fertile Crescent
2.Indus Valley
3.the Huanghe Valley
4.River Tigris
5.River Euphates
6.River Indus
7.Huanghe
8.flooded
9.pharaoh
10.hieroglyphics
11.Rosetta stone
12.plough
13.shaduf
14.water-clock
15.sundial
16.papyrus
17.life after death