| 1. My friend is a system administrator.
|| a. We use a/an to describe something.
| 2. Can you pass me a CD from that box by your side?
|| b. We use the, if we know which one, as it was mentioned before or it is clear from the situation.
| 3. We must have a meeting in the IT department.
|| c. A/an mean "one", so we cannot use a/an with plurals or uncountable nouns. The is possible.
| 4. Windows 2000 is a very good program.
|| d. We use a/an to refer to one of a group of things.
| 5. The information about this program gives us the chance to be the best.
|| e. We use the with nationalities and other groups.
| 6. Where is the laptop?
|| f. We use the with superlatives.
| 7. I really admire the Japanese for their IT development.
|| g. We use a/an to refer to something for the first time.
| 8. This is the best and the newest model of computers in the market.
|| h. We use a/an to describe someone's job, but not areas of business.