I' m sure you all know how important recycling is．Recycling is when you take old things and turn them into new things． It sounds like magic． But it's actually very scientific．

Materials	The first thing you have to do is to collect items that can be recycled．Only certain materials can be recycled． These include things made out of paper， metal， glass and plastic．
Daily things	Can you think of everyday items made of these materials？ Soda cans are a good example． They are made out of metal． Magazines and newspapers are made out of paper． So are cereal boxes． Some bottles of juice are made out of glass． Bags and yogurt containers are made out of plastic． There are many things that can be recycled．
Loop	These things are usually stamped with the recycling loop． It has 3 arrows that go in a triangular（三角形的） circle． This shows that cycle（循环）continues． Items are thrown away but continue their lives as something else．
Process	Let's go back to the process of recycling．①The items are put in a recycling bin． ②A truck carries the items to a recycling plant．③The materials are separated and squashed（被压扁成） into square cubes．④Companies buy and turn them into new products．

（1）What is"recycling"according to the passage？　　

A． It's a magic performance．

B． It's a way of burning old things．

C． It's a way to make old things useful．

D． It's a scientific research．

（2）Which material is not mentioned in the passage？　　

A． Rubber．

B． Metal．

C． Glass．

D． Plastic．

（3）You can put your old things into a recycling bin except　　．

A． soda cans

B． magazines

C． cereal boxes

D． all bottles

（4）The"3 arrows" shows that the items　　．

A． have some valuable stamps

B． are in a triangle circle

C． are recycled and reused

D． are thrown away

（5）The passage is mainly about　　．

A． recyclable materials

B． recyclable daily things

C． the recycling process

D． recycling in a scientific way