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Drop the right meanings from the below box:
 
Answer variants:
Letter
Advice
Household
Mysterious
 
1.
 \(=\) Difficult or impossible to understand, explain, or identify
 
2.
 \(=\) An opinion that someone offers you about what you should do or how you should act in a particular situation
 
3
 \(=\) A written message from one person to another, usually put in an envelope and sent by post
 
4
 \(=\) A group of people, often a family, who live together