Ответ:
Краткое пояснение: Перефразируем предложение, используя конструкцию "in use".
This plane has been in use for over 25 years now.
Ответ: This plane has been in use for over 25 years now
This plane has been in use for over 25 years now.
Ответ: This plane has been in use for over 25 years now