Read the passage and choose the correct answer:
Multiple-choice exercise
Choose the correct answer for each question.
Four planes took off from the airport. They were called flight 22. They consisted of three student pilots and their leader. They were flying over the ocean. The airport received a message from the leader saying that his compass had stopped working. He didn't know how to come back to the airport and that he was lost. The airport sent some planes to search for flight 22, but they found nothing. The officer in charge of the airport received another message from flight 22 saying that the compass started working again. Then, the officer told the leader of the flight to come back to the airport.
