exposed to us,
This would be better as "being offered to us"
difficuties
"difficulty"
about the real life
Better as "real life"
the
You are referring to a previous statement you should say "that"
besides
"Beside"
It is know to us that the famouse film,Harry Pottter,is based on the fiction,which is written by Jack Rolly
This sentence is non-sensical,but also riddled with factual inaccuracies. "It is well known that the famous Harry Potter films are based on a fictional book series,which is written by J.K.Rowling"
But we can not deny that Harry Potter is a film that is worth watching.
This sentence does not quite fit and interrupts the flow.It also is sort of a repetition.
People learn from the movie about the improtance of friends and teamwork.Meanwhile,People are taught that evil would never defeat justice.
"People learn from the movies about the importance of friendship and cooperation.Also,people are taught that evil would never defeat good."
As for the rest,I would advise you to run this through a spell check because it has a lot of typos.Also,missing spaces,punctuation errors and so on.