单选题 --Can I help you?
--I'd like to buy a present for my father's birthday, ______ at a proper price, but of great use.
  • [A] that
  • [B] one
  • [C] anyone
  • [D] everything


【正确答案】 B
【答案解析】[考点] 不定代词
[解析] one可以代替前面出现过的可数名词。本句中one代替前面的a present。anyone作为不定代词一般用于否定句中。用于肯定句中时，往往用在条件句。所以，本题选B。