供大于求

供 = 亻 + 共 : Gitta Giraffe ((e)ng1) is donating (供) blood in front of the engine ((e)ng1). Rosa Luxemburg (亻) draws the blood and the communist (共) stores it.

供 = 亻 + 共 : Gitta Giraffe (gu) is being interrogated by Rosa Luxemburg (亻) and the communist (共) In engine's bathroom ((e)ng4). Rosa and the communist want to squeeze a confession (供) out of Gitta, so they use the water boarding (供) technique.

大 = 一 + 人 : The big (大), huge (大) robot (mnemonic symbol for 大) is working out in the ashram's bathroom (a4). He's lifting a flute (一) to which Don Quixote (d) and Neanderthal man (人) are clinging.

于 = 亅 + 二 : Mnemonic symbol: prepositions (in, at, on, to, ...) are what glue the sentence together. Honey is as sticky as glue, so I'll represent 于 by a honey jar.

Yu the Great (于) was assigned to repair the electronics of the space station's kitchen (Ø2), but instead he was snacking honey from a honey jar (于). Unfortunately his capacitor (二) got stuck in the honey and now he has to use a crowbar (亅) to lever it out.

求 = 永 : Mnemonic symbol: a service request bell. You know, the kind you find in a hotel on a service counter.

求 = 永 : In the outhouse's kitchen, the Queen of Hearts sees a diamond ring and wants to have it immediately. Determined she rings the service bell endlessly to request the immediate handover.