第一句和第二句换一下比较好,“某时某地做某事原因是什么”更符合逻辑.
Last Friday,from 3pm to 6pm,an international food festival was held in the Sunshine Park.The aim of the festival is to make some friends.At the festival,I sold much fast food like apple pies,hamburgers,fried chips and so on.Although the fast food is unhealthy,many young people like it.
英语很讲求化零为整,你的句子太短了,所以我把句子改长了.还有就是人称不要老变,一下"I"一下"we"老外看不懂的.你可以随便找篇英语阅读来看看它的人称和句子长短就明白了.