问题详情：
单项选择
—Good morning, sir！________？
—I'd like to buy a sweater for my daughter.
A．What can I do for you
B．What are you doing
C．How about the sweater
D．Can you help me
【回答】
A 解析：考查交际用语。What can I do for you? “您要买点什么吗(我能为您做点什么吗)？”根据题意可知选A。
知识点：口语应用
题型：选择题
