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Ifawordendsintheletter"er",thatwordmustbethenameofpersonorthingthatdoesacertainaction.

题目详情
If a word ends in the letter "er",that word must be the name of person or thing that does a certain action.
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答案和解析
如果某个单词是以er结尾的,那么这个单词一定是表示某类动作行为的发生者.