视频地址：https://video.cache.bdschool.cn/vd/b2c9e7072536f3c73da0ea1e928d2401.mp4
附件：0427 初二英语（人教版）-Unit 2 I’ll help to clean up the city parks. Period 2-3学习任务单.docx
附件：0427 初二英语（人教版）-Unit 2 I’ll help to clean up the city parks. Period 2-1教案.docx
附件：0427 初二英语（人教版）-Unit 2 I’ll help to clean up the city parks. Period 2-2 PPT课件.pptx