The classroon is so clean.Someone---(could/must)clean it jus

The classroon is so clean.Someone---(could/must)clean it jus The classroom is so clean,Someone __must____ clean it just n let's (clean)the claSSroon 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 the room is so dirty _we clean it? 时态填空 -The classroom is so clean.When__you___it(clean)it?-We how clean the room is.yes,i am sure that someone [ ] it The floor is so clean.Who___it? So the cities must reach out to the clean country It is very()(clean).