题目

He _____ 20 dollars for his old bike the other day and bought a new one. A. paid 　 B. cost   C. took 　 D. spent   答案： 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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