| 4. b) | Why do you think people who are 50 years old or more need to have a medical certificate? |
| RESPUESTA PROPUESTA EN LA CLAVE OFICIAL: |
| People who are more than 50 years old need a medical certificate because they are more vulnerable to illnesses. They can have a heart attack, for example, or can suffer damage to their brains or other organs. They have to be more careful than young people. |
| NOTA: esta respuesta es simplemente una propuesta entre otras posibles. Añade la tuya como comentario a esta entrada y la comentaré. |
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