cleaned our classroom ( ) Thursday.a.lastb.nextc.ond./拜托讲仔细,越细越好,为什么答案是c呢？

My classmates cleaned our classroom.变为一般疑问句 She cleaned our classroom yesterday主动句改为被动句 We cleaned our classroom last Friday.一般疑问句 英语选择题（写理由）---We should do something _______ our environment ______.A.keeping,cleaned B.to keep,being cleaned C.to keep clean D.keeping,cleaned The classroom in our school ____every day.A.is cleaned B.are cleaned C.were cleaned D.were built求答案以及讲解 we should Keep our classroom ---A.cleaned B.clean C.cleaning D.to clean说说原因 We must keep our country_______. A.cleaning B.clean C.to clean D.cleaned Our classroom is cleaned (every day).括号提问 _____ ______ is the classroom clesned? Our classroom is cleaned every day and ___ (keep）clean and tidy. We must keep our country ________.A.clean B.to clean C.cleaning D.cleaned We cleaned our classroom last Friday.(一般疑问句）___you___your classroom last Friday? we cleaned our classroom everyday on last year有没语病? We cleaned our classroom ___ Friday afternoon.A.in B.on C.at D.for the classroom is being cleaned in our school 改为主动语态拜托各位了 3Q Our monitor cleaned the room an hour ago 变为一般疑问句 Our monitor cleaned the room an hour ago 改为否定句 We have our house __cleaned_______every week by a cleaner.用cleaned对吗? we should keep our classroom ( ) A.clewe should keep our classroom ( ) A.cleaning B.cleaned C.clean