1. Mrs Jackson apologized for the mistake. We complained to her. (using relative pronoun) 2. Lan's party is next Sunday evening. We are all invited to it. ( using relative pronoun) 3. He was the first man who left the burning building. ( Reducing relative clause) 4. The pilot was the only man who survived the crash.( Reducing relative clause). 5. The man that was interviewed yesterday was the last one.( reducing relative clause) 6. The person that arrives at the party will be given a small gift( reducing relative clause)

1.Mrs Jackson whom we complained to aplogized for the mistake

2, Lan'n party which we are all invited to is next Sunday evening

3, He was the first man to leave the burning building

4, The pilot was the only to survive the crash

5, The man interviewed yesterday was the last one

6. The person arriving at the party will be given a small gift

1. Mrs Jackson, whom we complained to, apologized for the mistake.
2. Lan's party, which we are all invited to, is next Sunday evening.
3. He was the first man leaving the burning building.
4. The pilot was the only man survived the crash.
5. The man interviewed yesterday was the last one.
6. The person arriving at the party will be given a small gift.