HOMEWORK:

A. What is the most interesting city to visit in your country? Why do you think so?

=> I think Jeju is the most interesting city to visit in my country because, Jeju is famous city(island) and also there's many things to look about.​ 

​=> ​I think, Jeju is the most interesting city to visit in my country because Jeju is a famous city / island and there are also many things to see there.

=> Corrected : The sentences are corrected grammatically.