Match the two halves of the sentences. Type the letter in the box.
1. If you click on the wrong icon, A as soon as you switch it on.
2. The machine switches itself off B if it is not used for 10 minutes.
3. A message on the screen warns you C when the ink is running out.
4. The computer connects to the Internet D an error message appears.
5. You can use the battery pack E when you clean it.
6. You should use a special chemical F as long as it is fully charged.
