Choose, to complete each sentence, either "should" or "shouldn't".
1. Listen to that music! Our neighbors _______ play music that loud at this hour.
2. If your tooth is still hurting you tomorrow, you _______ go to the dentist's.
3. Cathy _______ keep ringing her friend. I think it's a bad idea.
4. Before going to Madrid for your holidays, you _______ try and learn something of the language. You will enjoy things a lot more.
5. You _______ always knock on the door before entering. This is a private office.
6. We _______ leave too late tomorrow if we want to reach the beach before lunch.