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2. Fill in the correct prepositions.

1. I need to print out three documents.

2. They shut down the system two days ago.

3. Plug in the USB drive and open the file.

4. You need to log in to enter your account.

5. David turned off his computer and went out.

6. Vic logged out before switching off the laptop.

7. Remember to sign out before you leave the game.

8. In the test, I keyed in the wrong answer in the box.