Bonjour, j'aurais vraiment besoin d'aide pour la question B merci

4. a) Did she know her friend was dead ?

b) Will they do what we have asked them to do ?

c) Did the two witnesses identify the body ?

d) Had the murderer trhrown the gun away ?

5. a) Who gave them a call last night ?

b) What did they hear 

c) When did they find the body ?

d) To whom are these clothes ?

6. a) Why were Johnny and Della in this car ?

b) How many people did the police arrest yesterday ?

c) Where did the victim live ?

d) What were they affroid of ?