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1. sick. 2. for. 3. help. 4. few. 5. knew. 6. that. 7. whenever. 8. further. 9. tie. 10. doctor’s If you get s___1____today, you will not have much trouble sending f__2____a doctor or being sent to a hospital. In the early 1900s,this was not the case. Sometimes doctors had to travel many miles to h___3____their patients. There were f__4___telephones or automobiles.(汽车) This often caused a delay of hours before the doctors even k____5___they needed. Doctor Morris of Nebraska solved this problem. He used homing pigeons.(鸽子) A homing pigeon is a bird t__6____always flies home when released(释放), Doctor Morris would leave one of his pigeons w___7____he was visiting a patient. If the patient needed f__8____help, instructions were to t___9____a note to the pigeon’s leg and let it go. The pigeon would quickly fly to the d__10______home. Help would soon be on its way.
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