Выберите правильный вариант. Модальные глаголы

I______(1) understand why my girlfriend______(2) be angry with me. I always do all I ______ (3) not to have a row with her. She______(4) treat me like this because one day I

______ (5) be offended.

1. can't 1. can't 1can 1can

2. should 2. should 2. should 2. should

3. can 3. can 3. could 3. can

4. mustn't 4. doesn't have 4. mustn't 4. mustn't

5. may 5. may 5. may 5. may