[originaltext]M: How much are these pens, please?W: 2 for 7 dollars now. They

游客2023-09-27  28

问题  
M: How much are these pens, please?
W: 2 for 7 dollars now. They used to be 5 dollars each.
Q: How much will the man have to pay if he buys 4 pens?

选项 A、$ 7.
B、$ 10.
C、$ 5.
D、$ 14.

答案 D

解析
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