Ответ:
1. The university is too far for me and Karen to go on foot every morning.
2. Neither Bob nor Maria likes travelling to Sofia.
3. Lily was the only student who didn't go on the excursion to Turkey.
4. You aren't allowed to use reference books and dictionaries when you sit an exam.
5.My son always has difficulties to understand his lessons in Physics and History.
6. The mobile phone Joseph was given yesterday is the best moble phone Joseph has