23.Canada Geese are large blue and white birds.When autumn comes,they have to fly to the south where the weather is warmer.The winter is so cold in Canada that the birds will die if they stay there. Last spring,Bill Lishman found sixteen young Canada Geese on his farm. "They had lost their way,"Bill thought. "These young birds don't know what to do in the autumn." Bill had a small plane and he decided to teach the birds to follow him.All the summer,he went on short trips in his plane and the young geese flew after him. The autumn was coming,so Bill flew to Virginia in the United States,600 miles south from his home in Canada.The geese followed him all the way.Bill flew to Virginia and returned home. This spring,Bill was waiting for the birds to come back.But they didn't arrive,so Bill flew to Virginia to get them.He looked for them for two weeks but he couldn't find them. When he returned home,Bill found the geese were waiting for him.They had found the way home without him!
(1)Why do Canada Geese fly to the south when autumn comes?
(2)Where did Bill find sixteen young geese last spring?
(3)How did Bill go to Virginia?
(4)How long did it take Bill to look for the geese in Virginia?