Краткое пояснение:
Логика: Заменяем глагол 'can't' (не может) на 'is not able to' (не способен) для сохранения смысла предложения, указывая на отсутствие возможности или навыка в данный момент.
Ответ:
- 1) Bob is not able to answer difficult questions now, but when he is older ...
- 2) Bob is not able to fly a plane now, but ...
- 3) Bob is not able to go to university now, but ...
- 4) Bob is not able to work on the computer now, but ...
- 5) Bob is not able to have a bank card now, but ...