--- Can I help you ? --- I’d like to buy a present for my best friend, at proper
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--- Can I help you ?
--- I’d like to buy a present for my best friend, _______at proper price but of great use.
A. that B. one C. it D. this
试题答案
B
解析:
one可以用来指代前面提到的人或事物，此句中指代a present，one作present的同位语。