They must clean their classroom every day改为同一句They （）（） clean their classroom every day

They must clean their classroom every day改为同一句They （）（） clean their classroom every day They must keep their clothes______.A.clean B.to cleanC.cleaningD.bo cleaning They must look after themselves and keep ________.A.clean B.happy C.good D.healthy You must keep ( ) clean and tidy.a.they b.them c.their d.theirs 为什么 如题 如果用must 提问一般疑问句,否定回答用什么?如题：Must they clean the classroom now?否定回答是什么? Must they clean the classroom now?No,they ___.A.can't.B.needn't.C.don't.D.mustn't为什么选d Must they clean the classroom now?No,they ___.A.can't.B.needn't.C.don't.D.mustn't you must clean the window对clean the window提问 Are they [ ] [clean] the room. HOW many children do they have 翻译 Who looks after thei son We must ___ our ciassroom clean. you must clean your bedroom every day You must keep the bedroom ______(clean) We must clean their classroom, not_______(we) We must ___(keep) the classroom clean. You must clean the classroom.(改为祈使句) her house must be very ---（clean） some people ____much rubbish behind after they played on the beach.we must tell them to keep theenvironment clean.A threw B put C left D picked