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1. They think that the man has lived abroad 
It.....................................
The man..............................
2. They say that the police are looking for the missing boy
It........................................
The police...............................
3. People think that thr Great  Pyramid was built over a 20-year period.
It...............
The Great Pyramid.......................
4. They believe that he is a liar.
It...................
He...............
5. Many people think that fame and money are the end of life
It.......................
Fame and money...............