◎ 题干
Liu Ming wants to buy some school things. According to the list, if he buys twelve exercise books, four knives, five pens, double rulers and a pencil-box, he will pay    .
 Thing
 Knife
 Pen
Exercise book
Ruler
Pencil-box
 Price
¥2.50
¥15.00
¥3.00
¥1.50
¥16.00
Good news : If you spends more than one hundred yuan in buying pens, you will enjoy a 40% off for the whole list.
A. 140 yuan       B. 84 yuan        C. 56 yuan
◎ 答案
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◎ 解析
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◎ 知识点
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