a. Everybody thought they were orphans until their father showed up
b. Everybody knows that she is friends with the Prime minister
c. People believed that he spoke to gosts
d. People knew that hje walked his dog every day at 6 p.m.
e. Everyone says that they have died in strange circumstances
f. People belive that she left soon after they got married

Ex 3:
a. I heard this man was a genius
b. It is said that she has always been rich
c. It is rumoured that he has nine cats
d. I heard that they shouted at their children
e. That murderer declared that he strangled all his victims
f. It is rumoured that the local police are holding a suspect for questioning
g. It was declared that the suspect wasn't innocent

I hope this helped!