he finds a pair of scissors to cut something out of the pape

这里的to cut 是衔接前面的find 这个动词的 find sth to do 不定式表达目的意味他找到了一把剪刀去把纸里面的一些东西切除掉
下面的是转载给你的,你看看：be popular with受……欢迎 更多人会用be popular with
例如：Loud music is more popular with young people than with old.
be popular to意思和be popular with差不多,但是用法上有点区别
例如：If you want to impress your peers (friends) it is generally more popular to show them , (to do this, to say, usage with the verb to be) your cool rDVD collection
be popular for在...领域受欢迎
例如:Special English has become a very popular tool for teaching English