1/ John Smith is a farmer. I bought his land. ( Using relative pronoun "whose") *
2/ Graham took us to his office. It was filled with books. ( Using relative pronoun "which")
3/ Although she has less teaching experience than the other staff member, she is one of the best teachers. ( Using "in spite of / despite")
4/ He was the first man who left the burning building. ( to infinitive)
5/ None of the pedestrians who were walking up and down the busy street stopped to help the elderly man who was slumped in the door way. (present participle)