Exercise 8. Complete the sentence with the Past Simple or Past Perfect form of the verb in brackets.

1. When I (try) tried to use my laptop, I realized the battery (run) __________ down.

2. I (turn) __________ the computer off, but forgot that I (not save) __________ my work.

3. I only remembered I (not pay) __________ the bill when my Internet connection (stop) __________ working.

4. When I (receive) __________ the e-mail, I couldn't understand who (send) __________ it.

5. When I (check) __________ the instructions, I understood what I (do) __________.

6. I knew I (receive) __________ a virus when I (run) __________ the anti-virus program.

7. As soon as I (download) __________ the document, I knew I (make) __________ a mistake.

8. I could see what (go) __________ wrong as soon as I (look) __________ inside the printer.

9. I knew I (press) __________ the wrong key when nothing (happen) __________.

10. When the screen (go) __________ blank, I couldn't understand how it (happen) __________

1. When I tried to use my laptop, I realized the battery had run down.

2. I turned the computer off, but forgot that I hadn't saved my work.

3. I only remembered I hadn't paid the bill when my Internet connection stopped working.

4. When I received the e-mail, I couldn't understand who had sent it.

5. When I checked the instructions, I understood what I had done.

6. I knew I had received a virus when I ran the anti-virus program.

7. As soon as I downloaded the document, I knew I had made a mistake.

8. I could see what had gone wrong as soon as I looked inside the printer.

9. I knew I had pressed the wrong key when nothing happened.

10. When the screen went blank, I couldn't understand how it had happened.