A、10 B、15 C、20 D、30 B这道题是典型的数字类题型,考查数字的分析与计算。对话录音内容非常贴 近生活，询问求职广告的花费。录音中没有直接给出答案,需要参赛者在听的同时将对 话中出现的所有数字和其对应的对象用笔记录下来，然后进行简单的计算。从

W: I’ve put the job advertisement in the newspaper, Mr.Trim.And it was a bit more than $10 they quoted us.
M: As long as it was not $10 a day.
W: No, a week actually.I paid $15 in the end.I put it in for 2 weeks which should have made it $20, but they gave us a $5 discount.
Q: How much did the job advertisement cost?