please look the blackboard这句话哪儿错了

look at the ( ),please please look ----- the blackboard.介词 look at the blackboard,please. 改错:Please look the blackboard. Please look the words改错 look the ducks,please改错 please look the blackboard填一介词 Please look at the following pictures等于 Please look at the blackboad的同义词 look,the,at,please,teacher.连句 第三题：Children,please look the blackboard. “Please look on the biackboard.改错? Please ( )(look) at the blackboard用look的正确形式 Please look at the pictures _____ the poster.(in,on) please look at the pictures on the wall中文意思. Will you please the word in the dictionary?A、look atB、look outC、look forD、 look up Will you please the word in the dictionary?A、look at B、look out C、look for D、 look up Please look at the picture on the wall.=Please ( )( )look at the picture on the wall.该如何转换?