Exercise 4. Put the words into the right order to make a true sentence.

1. Frequency is usually given in megahertz.

2. The box contains a dialog window.

3. There are different types of printers.

4. How can you protect a computer from virus?

5. This key does not have the right position.

6. Laptops are about the size of a small typewriter.

7. He can not install complicated programs.

8. Where do you see viruses?

9. What converts a word from audio signals into electrical signals?

10. Information is stored inside electronic registers in hardware units of the computer.