Номер 4: ответы на вопросы:
1.He was enthusiastic about his subject.
2.He knew a lot and told very interesting facts about history.
3.He wanted to encourage the students to study the subject.
4.Allan studied a lot of catalogues of different museums.
5.Mr.Leads was Allan's best and worts teacher at the same time.
6.He couldn't attend his lessons any longer.