Вопрос по английскому языку:

Прочтите определение и напишите слово
1. To teach a practical skill. (to i _______ t)
2. Someone who goes to a university, college or school. (s _______ t)
3. An experienced person helps someone, who has less experience, especially in
their job. (m _______r)
4. What someone knows about a certain subject. (k _______e)