Find and correct the errors:The front-page articles in the daily newspaper has the most important news

Find and correct the errors
1.The front-page articles in the daily newspaper has the most important news.
2.Besides the zoo and the art museum,I've visited many others places in this city.
3.A student at the university should attend class regularly and hand in their assignments on time
4.Collecting stamps is one of my hobby
5.Chicago has many of tall skycraper
6.I come here three and a half month ago.I think I've made a good progress in EL