Change the sentences. Use the passive.
1 Someone has picked all the flowers.
All the flowers
2 People have heard wolves in these mountains.
3 An excellent team has won the competition.
by
4 A group of Australian explorers have found unusual animals in this forest.​

1. All the flowers have been picked by someone.
2. Wolves in these mountains have been heard by people.
3. The competition has been won by an excellent team.
4. Unusual animals have been found in this forest by a group of Australian explorers.