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| 1. |
Tell me which type of invention you have done what have you done for your parents |
| Answer» PRINTING PRESS LIGHT bulb.Light bulb.Airplane.Light bulb.Airplane.Personal computer.Light bulb.Airplane.Personal computer.Vaccines.Light bulb.Airplane.Personal computer.Vaccines.Automobile.Light bulb.Airplane.Personal computer.Vaccines.Automobile.Clock.Telephone. | |