1. They pledged not to break relations with the country.
2. She ' s just broken up with her boyfriend.
3. It is an indication of his mentality and yearning through the so - called" diffidation "with his close friend.
4. Cut off a friendship.
5. I decided to cut off contact with John because he was always negative.
6. Cut off ties with someone.
这些句子涵盖了不同的表达方式和语境，可以根据具体需求选择合适的句子。