1)its no wonder then that (sight) of ghosts are a common occurence here!
2) one of the most (frequent) seen ghosts is the headless anne boleyn!
3) the (luck) wife of henry VIII who was beheaded at the tower in 1536.
4) Stories of ghostly goings-on at the tower of london are (number) and still occur today.
5) Some say that Joseph Grimaldi, a mischievos clown who died 1837, often kicks actors ushers and (clean) fro, behind as they work!
6)The theatre’s most famous ghost, however , is the “man in Grey”,who only appears at the beginning of a (Success)perfomance.

1) It's no wonder then that sightings of ghosts are a common occurrence here!
In this sentence, the word "sight" needs to be changed to "sightings" to match the plural subject "ghosts". The word "sightings" is the noun form of the verb "to sight" and refers to the act of seeing something.

2) One of the most frequent seen ghosts is the headless Anne Boleyn!
In this sentence, the word "frequent" needs to be changed to "frequently" to correctly modify the verb "seen". The adverb "frequently" is used to describe the frequency with which the ghost is seen.

3) The lucky wife of Henry VIII who was beheaded at the Tower in 1536.
In this sentence, the word "lucky" needs to be changed to "unlucky" to convey the correct meaning. Anne Boleyn, the wife of Henry VIII, was not considered lucky as she was executed.

4) Stories of ghostly goings-on at the Tower of London are numerous and still occur today.
In this sentence, the word "number" needs to be changed to "numerous" to describe the abundance of ghostly activities. The word "numerous" means many or a large number.

5) Some say that Joseph Grimaldi, a mischievous clown who died in 1837, often kicks actors, ushers, and cleaners from behind as they work!
In this sentence, the word "clean" needs to be changed to "cleaners" to match the plural subject "actors, ushers, and cleaners". The word "cleaners" refers to people who clean the theater.

6) The theater's most famous ghost, however, is the "man in grey", who only appears at the beginning of a successful performance.
In this sentence, the word "Success" needs to be changed to "successful" to correctly modify the noun "performance". The word "successful" means achieving the desired or intended outcome.