Конечно! Вот исправленные и заполненные предложения с правильной формой модальных глаголов необходимости:
Free College
We believe that you have to be a great student to be successful at our college. It is important that you develop all your skills, including social and physical skills, so you need to have a strong character and believe in yourself. You need to have a very high level of English because we have an academic English program here and provide a lot of help. However, you must go to these English classes as you have to do your final research project in English.
The International College
All our subjects are in English, so you have to know English very well. Therefore, students must pass our own English test to enter the college. The system is very strict and you have to attend at least 90 percent of the classes to pass. Students also need to study another foreign language because we believe that languages connect people, and you must be able to speak to people in their own language.
Если нужно, могу объяснить выбор каждой формы!