[填空题]Before the invention of agriculture men were hunters. They went out every day. Sometimes they killed animals; sometimes animals killed them. Life was hard and dangerous. Women (11) go out every day, too. They collected roots, fruit and grasses. Then, one day, (12) years ago, a woman dropped some grass seeds. She dropped them near her home. They grew and the first wheat (13) . The idea grew, too. Women planted roots and fruit tree. Then they could stay at home and (14) the children and the animals. Women liked baby animals. They kept the baby animals: dogs, cows, sheep and goats. That idea grew, too. Then their husbands did net have to go hunting for meat. They stayed at home. They (15) villages and cities. Civilization began. Men began civilization after women invented agriculture.