题目解析:
foster: 培养,促进。A是接受;B是结合;C是引入;D是鼓励,促进。所以D的encourage正确。对应原文:In turn, a deep attachment to the land, and to the stability which rural life engenders, fostered the Roman virtues: gravitas, a sense of responsibility, peitas, a sense of devotion to family and country, and iustitia, a sense of the natural order.原句说对土地和稳定的依靠怎么样了罗马人的性格,责任感,为国家和家庭贡献,还有天然的秩序性。前者对后者应该是正向作用的,而accept/combine/introduce都没有倾向性,所以encourage正确。