摘要：2177] He 20 dollars for his old bike the other day and bought a new one. [译文] 前些天他把旧自行车卖了20美元.然后买了一辆新的. A. paid B. cost C. took D. spent [答案及简析] C. pay $ for sth.是花钱买什么,cost 是物作主语,spend $ on sth.与此句结构不对,take $ for sth.是表示“从-得到多少钱 .

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