Here are the rewritten sentences:

1. It is claimed that she works 16 hours a day.
2. It is believed that the company is planning a new advertising campaign.
3. There are expectations that the soap opera will continue next year.
4. It is alleged that the man drove through the town at a speed of 90 miles per hour.
5. It was reported that the President had experienced a heart attack.
6. It is thought that the prisoner escaped by climbing over a wall.
7. It is reported that the buildings have suffered severe fire damage.
8. It has been indicated that many people are homeless following the floods.
9. We all anticipated that Marta would pass her driving test.
10. It is believed that he was killed by terrorists.
11. It was known that you were in town on the night of the crime.
12. It was assumed by journalists that the footballer Wayne Johnson earned £10 million a year.
13. It is claimed that there exists a secret tunnel between those two houses.
14. It is known that they reside in a small flat on the fifth floor.
15. Many people think that the Prime Minister and his wife have separated.
16. It is believed that the boy is dressed in a white pullover and blue jeans.
17. It is expected that the hostages will be released soon.