7th grade esl

it is necessary

very famous and well known

to think and understand things quickly.

something that is difficult to understand or explain, or a story, film, or play that is about a crime or a strange event.

part of an event or a story that happens in one place.

well known for being bad.

try to find out what happened or what is the truth.

a person who tries to find out the facts about something, especially a crime or a mysterious event.

a person who is in charge of a library.

a formal meeting