题目内容：

阅读下面一则关于“垃圾分类”的指南, 补全学校学生会的倡议书。

Garbage sorting is a big project worldwide. In recent years, some Chinese cities have been working hard on it. People are asked to sort garbage into four groups: wet, recyclable（可回收的）, harmful and dry.

Wet waste is things you don't want but that pigs can eat.

Paper, metal, glass and other things that can be reused are recyclable waste.

Harmful waste includes things like medicine and batteries.

Finally, any waste that's not wet, recyclable or harmful will go into the "dry waste" bin.

If you don't sort your garbage, all of it will go to a landfill（垃圾填埋场）. These landfills will take up large areas of ground that could have been used for planting trees or crops. The electronic waste you throw away, such as batteries, can pollute the soil and groundwater. Other pieces of garbage, like the metal part of a pen, can be used to make other things.

 

Dear students,

What do you do with the garbage? If all the garbage is put into one bin and go to a landfill, it will not only waste land but also 1. the soil and groundwater. Garbage2. can solve the problems. We can sort our garbage into 3. bins: the used batteries should be thrown into the“4.”bin；The metal parts of the broken pens should be grouped into the "recyclable" bin; When we have some leftover food, we should throw them into the “5..”bin; The other waste will go into the "dry waste" bin. In a word, let's take action!

Sincerely,

The Student Union