To ____ the cover, loosen the screws. Before you work on the machine, ____ the power. ____ the lever to stop the engine. When the radio isn’t working anymore, ____ the old batteries and ____ new ones. Before you can start your computer, make sure that you ____ it to the power supply. ____ the cables on the right. Lift the cover and ____ the cables. With this joystick you can ____ and ____ the engine. When you have finished, ____ the screws. ____ the button to open the door. ____ the cover and insert the batteries. When you leave the room, ____ and ____ the door. Finally, ____ the computer.

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