On Monday we wtched a film about pollution. Mr Lo told to build a machine clean up rubbish. First we found some books to build a machine. Then we drew a plan about pollution. Next we startedbuild our machine. Joe helped but he put the plug in the wrong hole. Bang!There was a lot of smoke. Mr Lo was surprised. 批改后： On Monday we watched a film about pollution. Mr Lo asked us to make a machine to clean up rubbish. First we found some books about making a machine. Then we drew a sketch. Next we startedto make our machine. Joe helped but he plugged it into a wrong plughole. Bang!There was a lot of smoke. Mr Lo was surprised. 三年級:Willliam