I’d like to buy a present for my girlfriend’s birthday， at a reasonable price but of great value.
A. which
B. as
C. that
D. one
网友回答
A. which
B. as
C. that
(答案→)D. one
解析：此题考查one作代词的用法。one在句中替代a present以避免重复。注意，此处不是非限制性定语从句而是同位语。该句意为“我想为女朋友买个生日礼物——一个价格合理而意义重大的礼物”。