who is helping the teacher()the blackboard.A.cleaning B.clea

who is helping the teacher()the blackboard.A.cleaning B.clea she_____the blackboard before the teacher arrived.A,had clea who cleaned the blackboard yesterday?--Mary( )单选A.was B.clea mike is the cleaning now blackboard I remembered ____ the classroom.A.to clean B.cleaning.C.clea The blackboard is ( ) the teacher.A.behind B.am C.in D.under 4.The blackboard is ______ the teacher .A.behind B.on C.in D Who is cleaning the classroom?A 、 Linda does B、 Linda is C、 Look who ( ) on the blackboard?A is writing B are writing ()turn is it to clean the blackboard today?a:who.b:which,c:w she is cleaning the blackboard now对划线she提问 sally is cleaning the blackboard的中文意思