1. When you see a lot of rubbish（垃圾，废物)in your schoolyard(校园), how do you feel?
2. Do you know about World Environment (环境) Day? What is it?

Language Points
1. It's a special day to draw people's attention to theenvironment.
这是引起人们对环境的注意的特殊日子。
attention名词，“注意，留心”，主要用于短语中。draw one's attention意为“引起某人的注意”He wants to draw his teacher's attention.他想引起他老师的注意。

2. We should pick up that garbage!有人应该捡起这些垃圾!
pick up动词短语，意为“拾起,捡起”，如果宾语是代词，应放于两词中间。例如:
He picked up a piece of paper and put it into the dustbin.他捡起一张纸把它放在垃圾箱里。
和pick up结构相同的短语很多。
例如: put on（穿上）,take off（脱掉)，turn off(关上)，turn on（打开),put away（收拾好）,look up（查词、字)，try on（试穿)等，代词作宾语时放中间,名词作宾语放中间放后均可。

3. Each student could clean up a bit of the school yard.每个学生能清理一块儿校园。
each形容词，每一的,后加单数名词。each day每天each student每个学生
a bit of固定短语“一点儿，一些”，修饰不可数名词,相当于a little。但a little后不加of。例如:l know a bit of (a little)English.我懂一点英语。
另外，a bit修饰形容词或副词。例如:It's a bit cold today.今天有点冷。