《Keep our city clean》PPT(第一课时)第一部分内容：IntroduceAnswer questions：What makes our city dirty?______makes our city dirty.What can we do to keep our city clean?We can _______. Keep our city cleanPPT，第二部分内容：Wordsclean /klin/形容词,表示“干净的、整洁的&rd
《Keep our city clean》PPT(第二课时)第一部分内容：IntroduceWhat makes the air dirty? ……makes……What can we do to keep our city clean? We can …… Keep our city cleanPPT，第二部分内容：ExpressionsWhat makes the air dirty？什么
《Keep our city clean》基础知识PPT第一部分内容：重点单词1.keep 保持 2.clean 干净的3.make 使……变得4.dirty 肮脏的5.museum 博物馆6.ground 地面,地上7.air 空气8.smoke 烟雾9.rubbish 垃圾10.messy 肮脏的,乱七八糟的 Keep our city cleanPPT，第二部分内容：重点短语1. keep our city clean 保持我们的城市整洁2.