Turn the following sentences into the passive voice (Mỗi câu làm theo 2 cách)

II. Turn the following sentences into the passive voice (Mỗi câu làm theo 2 cách)
1.They think that he has died a natural death
2.Some people believe that 13 í an unlucky number
3.They say that John is the brightest student in class
4.They reported that the President had suffered a heart attack
5.I knew that they had told him of the meeting
6.They declared that she won the competition
7.They rumored te man was still living
8.People think that Jack London's life and writing's represent the American love of adventure
9.They reported that the troops were coming
10.People believed that the earth stood still