【正确答案】正确答案： To whom it may concern, This is to certify that Mr. John Green has been employed by ABC Factory for the past 10 years. Mr. Green first served his apprenticeship in the factory, followed by a three-year course of Production engineering. He is technically well qualified and for the past five years he has been the Assistant Works Manager responsible for production and related business in our factory. In all his job duties he has shown himself to be hard-working, responsible and in every way a very dependable employee. I feel sure that if he were to be chosen to manage your factory, he would bring to his work a true atmosphere of teamwork. Yours sincerely, Li Ming Manager of ABC Factory

【答案解析】解析： 题目要求以经理的身份给前职员写一封工作证明信。证明信属于正式书信，语言应正式，用词应准确、恰当、简洁和严谨，语气则应严肃认真，内容应属实，不可弄虚作假。此外，为他人出具证明是严肃的事，因此，信件格式要规范。据此可谋篇布局如下： 第一段：点明写信目的，说明要证明之事。 第二段：阐明被证明人的工作经历、能力和表现等。 第三段：再次肯定被证明人的能力，表达期待。