Answer:
1 It is reported that the little boy is in good health.
2 In the past, smoking was not known to be so bad for your health.
3 The singer is believed to have left the country already.
4 It was estimated that the journey would take two days.
5 His life is not thought to be in danger.
6 It is estimated that teenagers need about nine hours of sleep a night.
Step-by-step explanation: