他忘了在饭盒上贴标签，有人不小心错拿了。(label)

He forgot to label his lunchbox, so someone accidentally took it. / He forgot to label his lunchbox, so someone took it by mistake.

考查动词和名词。分析句子可知，这里时态应用一般过去时表示过去情况。“忘记做某事” 表达为forget to do sth.，因此表示 “他忘了在饭盒上贴标签” 应用he forgot to label his lunchbox；表示 “有人不小心错拿了” 可翻译为so someone accidentally took it，其中accidentally (意外地) 为副词作状语；表示 “有人不小心错拿了” 也可翻译为so someone took it by mistake，其中by mistake (错误地) 为介词短语作状语。故翻译为：“He forgot to label his lunchbox, so someone accidentally took it.” 或 “He forgot to label his lunchbox, so someone took it by mistake.”。