Fill in the gaps with the words from the table. Use the right forms. There is one extra word.

turn up, plug in, cut off, switch on, press, unplug

1. If one ..... this button, one gets boiling water.
2. After finishing all activities, you should make sure that you have ..... all the appliances.
3. If there is a danger of fire, they always ..... electricity.
4. The first thing you have to do when you want to start it is ..... the cord to the socket.
5. If it is still too cold, you have to ..... the heater.