1、Unit 3 The environment and usLesson 17【学习目标】1To learn the meaning and simple usages of new words and phrases.2To understand and use the sentence patterns.【学习重难点】1To learn to use some new words to describe water.2To learn to introduce water to others.【学习过程】一、新知学习1There is salt water and fresh water o
2、n the Earth. Salt water is water from _and oceans. Fresh water is water from rivers and _.2单词翻译。salt_fresh_waste_sea_ocean_environment_3Finish the sentences to answer the questions.(1) What is fresh water?Fresh water is _.(2) What are the two ways people waste water?a. _.b. _.(3) How do people make water dirty?_.二、达标检测1They waste water when they keep water _.2They waste water when they water _.3They make water dirty when they throw _ into rivers and lakes.
