4. revision 修改，校对
　　 [P14-68]
　　Parents take a great interest in the _______ questions raised by their children.
　　A) nasty
　　B) naive
　　C) obscure
　　D) offensive
　　注：1. nasty 肮脏的，污秽的
　　2. naive 天真的
　　3. obscure 晦涩的，难懂的
　　4. offensive 粗鲁的，无礼的，冒犯的
　　 [P15-69]
　　 Although it was his first experience as chairman, he ________ over the meeting with great skill.
　　A) presided
　　B) administered
　　C) mastered
　　D) executed
　　注：1. preside 主持
　　2. administer 管理
　　3. master 掌握，控制
　　4. execute 执行
　　 [P15-70]
　　 Both parties promised to ______ the contract to be signed the following day.
　　A) keep with
　　B) tangle with
　　C) adhere to
　　D) devote to
　　注：1. adhere to 遵守
　　2. keep in with 跟某人保持友好关系
　　3. tangle with 卷入纠纷，卷入争论
　　4. devote to 奉献，贡献