Their classroom is big.they keep _________(its)clean every d

Their classroom is big.they keep _________(its)clean every d They must clean their classroom every day They usually keep their classroom clean .clean做什么成分? 改被动语态They clean their classroom every day. ______the students clean their classroom every day yes,they Our classroom is cleaned every day and ___ (keep）clean and t Our classroom is big and clean. ________ classroom is very big and clean. A．They B．There C．T they often clean their classroom often school =they classroo You must keep ( ) clean and tidy.a.they b.them c.their d.the We must keep our classroom (clean) every day the classroom must _____(keep)clean every day