Task 4 Choose the best answers to complete the following passage. Next time you see a pigeon flying 1 the sky, 1ook at it carefully! Is it holding a can? Or a camera? Or wearing a backpack? If it's a carrier pigeon, it just might be a working bird. You've probably 2 of working dogs that help police officers, or horses that help farmers. Did you know that carrier pigeons can be 3 to help people too? What kind of jobs do these birds 4 ? Carrier pigeons can be trained to carry messages to people. The note is 5 i nto a small skinny can. The can is 6 to the pigeon's 1eg . Then the pigeon flies off to 7 the note. Carrier pigeons are good messengers because they re fast and can fl y 1ong distances. They also have a good 8 of direction. T hey can even reach places that people can't. More than 800 years ago, Genghis Khan, an Asian 9 set up pigeon post offices across his lands! As recently as 2010, Cuba used pigeons to send election 10 to its mountain people.