A: Welcome to Weihua clothes Store, ?
B: I'd like to buy a sweater for my mum. Her birthday is coming.
A: A happy mum! does she like best?
B: She likes white. It looks good on her.
A: All right. What size do you want for your mum?
B: Small is OK.
A: this one?
B: It looks beautiful. How much does it cost?
A: Oh, it's 398 yuan.
B: What! 398 yuan? I think it is too
A: But wait a minute! There's a sale on today. Everything is half price.
B: Well, that's great! I'll it. I'm sure she will like it.
【答案】What can I do for you/Can I help you/ Is there anything I can do for you；What colour；What(How) about/What do you think about(of)/How do you like；expensive/dear/much；take/buy/have/get
（1）根据I'd like to buy a sweater for my mum. Her birthday is coming.可知答语叙述的是想给自己的妈妈买一件毛衣，所以上句应该问的是服务员问招呼顾客所说的，所以答案是What can I do for you/Can I help you/Is there anything I can do for you。
（2）根据She likes white.可知答语叙述的是喜欢的颜色，所以上句应该问喜欢什么颜色。What colour does your mum(she) like (better/best)/What's her favorite color。所以答案是What colour。
（3）根据It looks beautiful.可知这是对衣服的评价，你认为……怎么样？是What(How) about/What do you think about(of)/How do you like？所以答案是What(How) about/What do you think about(of)/How do you like。
（4）根据But wait a minute! There's a sale on today. Everything is half price 可知服务员向顾客推荐其他的比较便宜的衣服，这说明顾客应该说那些衣服太贵，所以答案是expensive/dear/much。
（5）根据I'm sure she will like it.可知顾客要买这件衣服，“买”是take/buy/have/get，所以答案是take/buy/have/get。