1. Please don't shout - I can hear you very well.
2. Look, the doorbell isn't working. We must knock at her door.
3. We must telephone the police. The number is 999.
4. I can't decide what to do tonight.
knock - pukać
decide - decydować
telephone - telefon/telefonować (dzwonić jest bardziej - "call")
shout - krzycześ