Yes. Because Cassius was the one who started the events that led onto Caesar's death and eventually on to his own death. Brutus did not like that Cassius was being un-loyal towards his own brother-in-law and therefore spoke up about it when they talked in the tent it act 4.
I'm not sure about number 1. Maybe: It was the happiest event. 2. The judge cautiously handed down her decision. 3. Mr. Majors was pressed hard to find an answer.