1. We learned how to give first aid to an injured person.

2. We practiced CPR. (Cardiopulmonary Resuscitation)

3. We practiced how to help people in danger.

4. We practiced how to help the handicapped.

5. We practiced how to take care of the sick.

6. We practiced how to save a person in a dangerous situation.

7. We practiced how to use saving machines.

8. We practiced how to give CPR to a person in coma.

9. We practiced how to carry a sick person.

10. We learned how to care for a person bleeding in an ambulance (car).

(Would you check the expressions above and correct the errors, please?)

They sound fine except for #7. I don't know what you mean by a "saving" machine.

??

Thank you. What about 'life-saving devices'?

Yes, that phrasing is fine.

=)

The expressions you provided seem correct, with the exception of a few minor errors. Here are the corrected versions:

1. We learned how to provide first aid to an injured person.
2. We practiced CPR (Cardiopulmonary Resuscitation).
3. We practiced how to help people in danger.
4. We practiced how to assist the handicapped.
5. We practiced how to care for the sick.
6. We practiced how to rescue a person in a dangerous situation.
7. We practiced how to use life-saving machines.
8. We practiced how to administer CPR to a person in a coma.
9. We practiced how to transport a sick person.
10. We learned how to treat a person bleeding in an ambulance or car.

Please note that some expressions have been slightly modified to improve clarity and accuracy.