1.She told my sister that she HAD BEEN wrong.("had been wrong" takes place prior to "told")
2.Libai IS one of the greatest poets.(When talking about literature,always use simple tense)
3.Looking up at the sky,I SAW a bird flying around the tree.(typical misplaced modifier question)
4.His brother wants to study EITHER AMERICAN OR ENGLISH LITERATURE.(parallelism issue)
5.Tom is one of the students who REFUSE to accept the invitation to the party.
6.She was knocked down by a bike,ALTHOUGH SHE WASN'T INJURED.("it" is an ambiguous pronoun)
7.UPON entering the room,I SAW no one.(misplaced modifier and diction problem)
8.Over the past years,the city has built NEARLY 1000 houses.(mispositioning of the word "nearly")
9.He had lost a purse and soon found it because the police helped him.("HAD LOST" happens before found)
10.The typist cannot find the machine which is packed in a box.(A misplaced modifier question)