Is it____turn____the blackboard?

Is it____turn____the blackboard? The blackboard is b_______ what color is the blackboard? Stave is ____ the blackboard What shape is the blackboard? blackboard There is a blackboard( )( )( )the classroom he is looking at the blackboard ------(happy) Our blackboard is（）,but the wall That is a blackboard 改成一般疑问句 转换句型our blackboard is broken. mike is the cleaning now blackboard