pleases j'arrive pas!! aidez moi a faire les 3 exos

Hello, Exercise 4: a/ Did she knew that her friend was dead ? b/ Did the two witnesses identified the body ? c/ Will they do what we ask them to do ? d/ Did the murderer throw the gun away ? Exercise 5: a/ Did someone gave a call last night ? b/ Did they heard something strange ? c/ Did they found the body a few days ago ? d/ Are these clothes yours ? Exercise 6: a/ Why were Johnny and Ella in this car ? b/ How many people the policeman arrested ? c/ Where lived the victim ? d/ Of what were they scared ?