Correct the mistakes in these sentences.

1. In the UK, students between 16 and 18 can go to a nursery school sixth-form college.
2. The school-ending age is 18 in many countries.
    
3. I’m glad you succeeded at your exam.
    
4. She has to sit on a Biology exam next week.
    
5. Is school compulsive till 18 in your country?
    
6. Do we have to admit our work to the teacher by Friday?
    
7. I’ve made a lot of progresses in my English recently.
    
8. Thanks to the LMS, teachers can mentor their students’ activities.