To WORRY is not a synonym of To CONCERN

To WORRY means to feel anxious about problems or potential negative outcomes

❌ The vast majority of students concern too much about the final test
✅ The vast majority of students worry too much about the final test

To CONCERN means to affect or cause someone to feel troubled

❌ The final test worries the vast majority of students
✅ The final test concerns the vast majority of students

@ieltsboyko