“（）should we clean the library?”“Twice a week.” A.How many B.How much C.How long D.How often应选哪个?

we should keep the water clean(改为一般疑问句） we should keep the river clean.(一般疑问句） We should keep our classroom _______(clean). We should clean our h[ ]before meals We should keep the nice room clean 英语翻译（1）We must make our planet greener.We can do a lot of things about it.Let`s begin today.(2) We should keep our rivers and oceans clean.Weshouldn`t make them dirty. We should clean the rabbit's hutch once a day.（对once a day提问） don't worry.we are thinking about （）Awhat should we do nextBif we should do thatC that we should doDhow should we do that What should we do ____________(keep) our classroom clean We should keep our room clean 改被动语态 what should we do to keep water clean The first thing ( ) we should do isto clean the room. We should keep the water clean 的汉语意思是? we should help——(clean) the classroom The first thing ( ) we should do isto clean the room. We should make the school ( )A.cleaning B.clean we should keep our ( )《river》and ( )《ocean》clean. we should Keep our classroom ---A.cleaned B.clean C.cleaning D.to clean说说原因