询问价格与购物对话 — 英语填空题
题目
在文具店购物，补全对话（每空一词，注意大小写）。A: Good morning! Can I help you? B: Yes, please. I want three pens. A: The pen is six yuan each (每支). Three pens are ___ yuan. B: OK. I'll take them. Here is a twenty-yuan note (纸币). A: Thank you. Here is your change (找零). You can get ___ yuan back.