By 1900, most states had laws against selling cigarettes to young people.

By 1900, most states had laws against selling cigarettes to young people.

正确答案：到1900年时，大部分州都已经颁布了禁止向青少年出售香烟的法律。

★《布宫号》提醒您：民俗信仰仅供参考，请勿过度迷信！