The classroom is so clean,Someone __must____ clean it just n

The classroom is so clean,Someone __must____ clean it just n 时态填空 -The classroom is so clean.When__you___it(clean)it?-We The classroon is so clean.Someone---(could/must)clean it jus The classroom is so clean .I wonder who （）（sweep）it 动词填空.. let is clean the classroom? The classroom is very clean now.It___(clean) by us just now. 1---it is so clean --- we s_____ the floor just half an hour — The classroom is ______ clean ______ it was yesterday. The classroom is dirty,snd it needs ______(clean). Look!Someone （）（clean）the room、How clean it is now!动词填空. Look!Someone （）（clean）the room .How clean it is now!动词填空 to the classroom clean ,you must clean it everday