Fill in the blank using the correct word to complete the idiom : A bolt from the ___________. AgreenByellowCbrownDblueAnswer: D. blue Read Explanation: Idiom: “A bolt from the blue”A bolt refers to a sudden flash of lightning.Blue refers to a clear blue sky.Lightning normally does not strike from a clear sky, so when it does, it is sudden and unexpected.So the idiom “a bolt from the blue” means:➡️ A sudden, shocking, or unexpected event. Read more in App