根据句意及所给的中文，写出恰当单词，使句子的意思完整、正确。
He could know great _________ (音乐家) from around the world．
The Great Wall is one of the ___________ (奇迹)in the world．
Jackie Chan is ___________ (认为) by many people as a superstar.
There are lots of___________ (富有的)people living in the centre of the city．
A witness ___________ ( 举报) that he saw a short thin man run into the room．