【暴虐版】第2册 E09 购物砍价

1. Is there any promotion?  

请问有折扣活动吗？

2. Do you have student discount? 

你们有学生折扣吗？

3. 20 percent discount

20 percent off

打八折

4. buy one and get one for free

买一送一

5. Can I have a receipt, please? 

可以给我一份收据吗？