精选优质文档-倾情为你奉上Unit 13 Were trying to save the earth!The First Period Section A 1a2c【Teaching aims】一、听、说、读、写以下词汇及词组：litter, bottom, fisherman, coal, public, ugly, advantage, cost, wooden, plastic, the bottom of, make a difference 二、通过学习，口、笔头掌握下列句型：1) The river used to be so clean.2) People are throwing litter into the river.3) It has always been the nicest river in this town.4) We should write to the government.5) I think one problem is that the air is badly polluted.
