WORK HERE 还是 WORK ON HERE

WORK HERE 还是 WORK ON HERE work hard in 还是work hard on 应该是work out 还是work on work on与work work on doing sth还是work on to do sth? 是work hard at sth.还是work hard on sth. 是at my work还是 on my work? They ____ it for hundreds of years.空里填work还是work on还是work in还是work at work on work.for 区别 They come here to work/working.是working还是to work?我个人认识是to work They go to work on foot everyday还是They on foot go to work everyday 完全不明白用法work in work on work at work from. 哪一个正确啊work in hotelwork on hotel work at hotel work from hotel 有什么不同吗,还是意思都一要,乱用就行了. work work work work work work