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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