1) Paul used to like literature at school very much.
2) Paul McCartney is an artist and has had several exhibitions of his works.
6) The song "Yesterday" was made by McCartney without anybody from the Beatles.
Остальные утверждения неверны
By this time next year you will be graduated from the university
He is becoming a doctor now
They had been driving at about ninety miles an hour when the accident happened
Потому что есть такое правило, как придаточных предложения времени и условия. В данном случае у нас предложение условия. Значит в придаточных предложениях времени и условия мы употребляем Present Simple, а действие всё равно относится к будущему.
Я незнаю английски язык я учу немецкий