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。