大学英语词汇课堂笔记 21-2
| 18. I am not sure whether I can gain any profit from the investment, so I can’t make a(n) ____ promise to help you. A. exact B. defined C. definite D. sure investment 投资investigate 调查irrigate 灌溉irritable 激怒的navigate 航行castigate 惩罚mitigate 缓和，调解，减轻 sure 确信insure 保险ensure 确保 define 限定，下定义 final 结束的 refine 提纯 finance 财政，资金 |
