Who __the battery-operated slippers invented __?Julie Thomps

Who __the battery-operated slippers invented __?Julie Thomps Do you known where to buy battery-operated slippers? Oh,I see.What about battery-operated slippers ,__and__? when were electric slippers invented?who were they invented “( )were electric slippers invented 请选择 A WHO B WHOM C OF WH operated 6V 4ah rechargeable battery Do you known where to buy battery-operated ____? Who invented tea? who invented bicycle who invented the bicycle who first invented TV __ __the pictures,please