covered
v.v. to put something over or around an object to hide, protect, or close it. You also use this when you talk about traveling a certain distance or dealing with a specific topic.
v. to place something over or upon an object for protection, concealment, or enclosure; to include or deal with a specific subject or area. Transitive — requires a direct object.
She covered the sleeping child with a warm blanket.
The introductory course is designed to ensure that students have covered all the basic principles before the final exam.
The investigative report covered the entire history of the scandal, from the initial anonymous tip to the eventual resignation of the board members.
The verb is transitive and often takes the preposition 'with' when referring to physical layers.
The book covers about the historyThe book covers the historyWhen 'cover' means to deal with a topic, it is transitive and does not take the preposition 'about'.