ListeningandWritingA:Whatareyoudoing?B:I’mdrawing.A:Whatshapeisthis?B:It’satriangle.A:Whatshapeisthis?B:It’sacircle.A:Whatshapesarethese?B:They’rerectangles.Thereareeightrectangles.Thebigoneisred.A:Whatisthis?B:It’salittleboy.A:Ha-ha!It’smadeof(由。。。组成)twotriangles,threecirclesandeightrectangles.123classroomhouseschool