Условие:

Match the pictures (1—15) with the names of inventions and technologies (a—o). a) bow and arrow; b) first houses and boats; c) cloth; d) use of fire; e) spear; f) plough; g) pyramid; h) stone axe; i) irrigation; j) pots; k) waterwheel; l) wood hoe; m) digging stick; n) aqueduct; o) arch