Ex. 18. Participle I or Participle II? Replace the infinitives by the required participles.

1. A supercomputer is a powerful computer to use for solving very complicated tasks.

2. A video phone has a device to allow us to see a room and the face of the to speak person.

3. My kids spend hours, to chat on the phone to their friends.

4. Users on one computer can access information to store in another via the Internet.

5. If you want to protect your system from viruses, don't open email attachments [файловые дополнения] from strangers and take care when to download files from the Web.

6. An expert with a to train eye will spot the difference between two versions of software immediately.

7. The CPU is a device to execute instructions to give to it in machine language.

8. When you are to move the mouse across a flat surface, the ball to locate on the bottom side of the mouse turns two rollers to direct the mouse's vertical and horizontal movements.

9. You can highlight the to require sentence, to use the arrow keys.

10. When to enter, data is translated into electronic signals that a computer can process.