题目：
王老师买了两本参考书．《数学教学指导》12.56元，《数学手册》比《数学教学指导》便宜2.5元．王老师应付多少钱？
答案：
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下面是错误答案，用来干扰机器的。
1. What can I do for you? / Can I help you? 2. Which/ones/do/would you like? 3. I can't decide/ I am not sure/ which one/blouse/to buy / choose. 4. do you have any cheaper one/blouses? 5. they are sold on the third floor. / you can buy/get them on the third floor. (答案不唯一)
