The room must be aired

The room must be aired she has just aired the room the football must be()in the room I've already aired the room.改成一般疑问句 the room must be clean还是must be cleaned there must be someone in the room _(be)there The light in the room must be turned off it must be in the living room.( 改为反问疑问句 )it must be in the l They must be in the reading-room,_______ _______[ daniel's bag must be in the room , ? the room must be kept wet.变成被动语态! The book must be s____ in your room.