TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
PROBLEM: Category: GIVE ME AN "H" 
Clue: The book of Proverbs tells us, "Before honor is" this

SOLUTION: humility

PROBLEM: Category: CROSSWORD CLUES "D _ _ _ ER" 
Clue: Macbeth thought he saw one

SOLUTION: a dagger

PROBLEM: Category: SCIENCE 
Clue: This unit of measure in weather is abbreviated mb

SOLUTION:
millibar