---What can I do for you?---I am looking for a birthday gift for my sister at a proper pr

问题补充：

---What can I do for you?

---I am looking for a birthday gift for my sister, at a proper price but fashionable.

A. one

B. anyone

C. that

D. everything

答案：

(答案→)A. one

B. anyone

C. that

D. everything

解析：考查代词，在这里one作a birthday gift的同位语，句意：我能为你做点什么？我正在为我的妹妹找一个生日礼物，一个价格合适很时尚的生日礼物。所以选A。