I___(clean) the living room for three hours.怎么写

I___(clean) the living room for three hours.怎么写 clean the clean the clean the Clean the As I___(walk)down the street ,I___(meet)Charile. I often surf the I___ on weekends. I___(真的)like the film The phone rang when I___(cook) She is i___ in the writer job Keeping quiet in the library is i___ 是clean the room 还是clean room? make the air clean the bedroom (clean) already. clean the blackboard clean the bedroom clean the classroom 保持-------the classroom clean.