题目

从商朝的覆亡中，我们可以得到的历史教训是国君应该（ ） A . 重视教育 B . 勤政爱民 C . 发展经济 D . 增强军事力量 答案：B-What’s the matter with John? He has been sitting there for hours. -A postcard from his father   an attack of home-sickness in him.A．took upB．set offC．brought inD．built up