A week has seven days. ______ seven days in a week.

admin2009-08-17  16

问题 A week has seven days.
______ seven days in a week.

选项

答案Cost

解析 原句的意思时“她花了20美元来买这本字典”。当物做主语表示花费多少钱的时候,其谓语动词用cost。
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