Q. Choose the correct preposition for given blank in the idiom. Cry ________ split milk.

Explanation:

The fixed idiom is “cry over spilt/spilled milk,” meaning to lament something that cannot be changed. Hence, the correct preposition is “over.” The other options do not form the idiom: “cry on” is used only in phrases like “cry on someone’s shoulder,” “cry at” is used with events (e.g., cry at a movie), and “cry upon” is archaic and not idiomatic here. Note: the standard form is spilt/spilled milk, not split milk.