— _______ we clean the classroom at once?  

---________ we clean the classroom at once? We should keep our classroom _______(clean). We should clean the classroom[ once a day].[对括号提问] 主动句改为被动句 we clean the classroom once every day except Saturd at school,we must clean the classroom 改为同义句 at school,we（ ）（ we should help——(clean) the classroom We must ___(keep) the classroom clean. We __(clean)the classroom this afternoon. We clean the classroom ( )Friday afternoon. shall we clean the classroom now The room is )dirty and we'd better clean it at once.A too mu 按要求改写句子。1. He makes me clean the classroom. (改为被动语态) &n