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pollution
The man is explaining.
校园
注意；留 心
垃圾；废物
垃圾
污染
解释
New words:
1. schoolyard n.
2. attention n.
3. rubbish n.
4. garbage n.
5.pollution n.
6. explain v.
There’s a lot of rubbish in the schoolyard. We should pick up the garbage!
Each student could clean up a bit of the schoolyard. We would finish cleaning in an hour!
Ⅰ. 写出下列单词和短语
1. 注意; 留心________
2. 垃圾; 废物_______
3. 污染________
4. 解释_______
5. 拣起; 拿起____ up
attention
rubbish
pollution
explain
pick
6. 把……打扫干净clean ___
7. 一点儿a bit __