一. 教学内容：
Unit 8 Save Our World
Lesson 57~ Lesson 60
1. 单词和短语
n. yard rubbish garbage bit a bit of pollution bag environment litre toilet sink tap metal plastic weight packaging percent cassette deck buzz power
v. pick up throw away pollute take out leak waste fix recycle save sort mend tear（tore/ torn） must reuse touch repair
adj. less reusable least leaky plastic
adv. exactly
