how are you?你好吗
i'am fine.我很好
nice to meet you很高兴见到你
what's thisin English?这个用英语这么说
How much is it ?它多少钱?（单数）
how much are they?它们多少钱?（复数）
thank you 谢谢
yon're welcome 不用谢
excuse me 打扰了