Collecting coins (cost\costs?)time and money because old coins are very hard to get.选COST为什么不加S呢?
2022-11-29 10:19:47 11次 反馈错误 加入收藏 正确率 : 100%
题目内容：
Collecting coins (cost\costs?)time and money because old coins are very hard to get.
选COST为什么不加S呢?
本题链接：
