Used to add new (often different) information.

Extremely important or necessary.

Act of marking homework (by a teacher). To simplify a text to make it easier for beginners.

something that is kept or meant to be kept unknown or unseen by others. Information that others do not know.

person who teaches. People who teaches others, especially in a school.

A part of a whole. To divide something into smaller parts.

very enthusiastic and eager. To make something or someone become more active.

Item that can be bought.

used for or engaged in speech. action of conveying information or expressing one's feelings in speech. To use words to tell information, express thoughts.

To get points in a test.

To make, or become, something better.

A business that sells things or provides services. associate with.

All of the things mentioned.

Work or help that is provided by a company. To maintain a piece of machinery so it runs well.

Being what was wanted or needed. used to greet someone in polite or friendly way. instance or manner of greeting someone. To greet someone who has just arrived.