定语从句 Sugar-free gum and candy______the sweetener xylitol should never be given to animals.空格处填contain还是containing,表达原则是什么?

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定语从句Sugar-freegumandcandy______thesweetenerxylitolshouldneverbegiventoanimals.空格处填contain还是containin

定语从句 Sugar-free gum and candy______the sweetener xylitol should never be given to animals.空格处填contain还是containing,表达原则是什么?
定语从句
Sugar-free gum and candy______the sweetener xylitol should never be given to animals.空格处填contain还是containing,表达原则是什么?

定语从句 Sugar-free gum and candy______the sweetener xylitol should never be given to animals.空格处填contain还是containing,表达原则是什么?
应填containing,这不是定语从句问题,也不是省略问题.
sugar-free gum:无糖香口糖,无糖香口胶
candy containing the sweetener xylitol :含甜味剂木糖醇的糖果
candy(containing the sweetener xylitol )括号内是定语
Sugar-free gum and candy containing the sweetener xylitol 是并列主语,意思是“ 无糖香口糖和含甜味剂木糖醇的糖果”