视频地址：https://video.cache.bdschool.cn/vd/408fd2f397b41a45245bbf38330b6379.mp4
附件：0506 初二英语（人教版）-Unit 2 I'll help to clean up the city parks. Period 4-1 教案.docx
附件：0506 初二英语（人教版）-Unit 2 I'll help to clean up the city parks. Period 4-2 PPT课件.pptx
附件：0506 初二英语（人教版）-Unit 2 I'll help to clean up the city parks. Period 4-3 学习任务单.docx