Change the following sentences from passive into active: 1. the young man was introduced by me. 2. this meeting will be organized by the producer. 3. symphony no. 9 was composed by beethoven. 4. the presents are often bought by her.

1. I introduced the young man.
2. The producer will organize this meeting.
3. Beethoven composed the Symphony No. 9.
4. She often buys presents.