This is a pencil., That is a pencil., , This is an eraser., That is an eraser., , This is a chair., That is a chair., , This is a table., That is a table., , This is a book., That is a book., , That is an eraser., This is an eraser., , That is a pencil., This is a pencil., , That is an eraser., This is an eraser., , This is a chair., That is a chair., , This is a pen., That is a pen..

This/ that

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