not only --- the children but also the grown_ups take interest in the cartoon.横线部分答案是不填不是要到装提个do

not only --- the children but also the grown_ups take interest in the cartoon.横线部分答案是不填
不是要到装提个do

如果 not only后面接句子的话使用倒装,如：
Not only did he refuse the gift,he also severely criticized the sender.
但是这里not only 连接的是名词 .

很高兴为您
这里是名词并列，不是句子并列，没有必要加谓语动词哦
希望我的回答对您有帮助，祝您学习进步，工作顺心。^_^

抱歉
就主语部分不用倒装。
例如：
Not only you but also I can do it well.
老师祝你学习进步！
望采纳，多谢！^_^

not only .....but(also) 不但而且
这里没有否定语气不要倒装
句首为否定或半否定的词语，如no, not, never, seldom, little, hardly, at no time, in no way, not until才要倒装