单选题
. Questions refer to the following e-mail.
27. How long has it been since Mr. Heffner received a payment from Mr. Offerman?______
27. How long has it been since Mr. Heffner received a payment from Mr. Offerman?______
【正确答案】
A
【答案解析】 选项A正确，邮件发送日期为9月14日，而上次付款是在6月9日，前后相隔三个月。选项B、C和D都错误。