Language goals: How to offer help.Key sentences: I’d like to work outside . You could help clean up the city parks.New vocabularies: think up (想出) clean up(打扫干净) hunger(饥饿) homeless(无家的) cheer up(使高兴起来) give out (分发)set up(建立),establish (建立)clean up hunger homeless cheer give out clean-up v.打扫干净;梳理整齐n. 饿;饥饿adj 无家可归的v.使振奋;使..