1.His parents were simple people.
商务用语：simple arbitrage 单一仲裁
simple commodity economy 单纯商品经济
simple contract 简单合同
2.He was sincere in his wish to help us.
商务用语：It is my sincere belief that... 我确信…
3.They sat on appropriation plans until they were certain which way winds were blowing.
重点词语：sit vi.重压；压制；拖延 vt.提供座位
商务用语：a theater that sits 1,000 people 能容纳一千人的剧场
sat on the evidence 扣压证据
4.The house has a fine situation.
商务用语：be in/out of a situation 有/失去职业
cope/do with the situation 应付当前的情况
save the situation 挽回局势
5.He has great skill in drawing.
重点词语：skill n. 技能，技巧，技术；熟练工人
商务用语：diplomatic skill 外交手腕
skill analysis training 技能分析训练
skilled employee 熟练工人
exert one's utmost skill 运用最大技巧