阅读下面短文，从短文后各题所给的四个选项(A)、(B)、(C)和(D)中，选出可以完成句子或回答所提问题的最佳选项，并填写在题前括号内。

　　It's important to learn about protecting our environment. Here is a 5R rule for us:

　　1．Reduce

　　If you want to reduce waste, you should use things wisely(明智的). A large number of trees are being cut down to make paper. If everyone uses a little paper carelessly and throw it out, soon we would not have any trees left. Other things are also being wasted, and people don't know what to do with the waste in big cities. So it is necessary to reduce the waste.

　　2．Reuse

　　You should always think of reusing the usable things before throwing them out. Give your clothes you do not use or the ones which are too small to the poor. In a family, you may pass on such clothes to younger brothers or sisters.

　　3．Recycle

　　Bottles, cans(罐子) and paper can easily be recycled. By doing so we save lots of time and money. For example, coke cans are sent to a factory, where they are smashed flat(压平) and melted(融化) and the metal things are made for new coke cans.

　　4．Recover

　　When you buy a box of apples, there may be a few rotten(腐烂的) apples, you have two choices: one is to throw the whole apples away, or you could cut off the rotten parts and use the good parts. In this way, you are recovering the eatable parts of food.

　　5．Repair

　　If one of the legs of your table is broken, you can repair it. If you want to change for better ones, it is better for you to sell the old things or give them to other people who can use them after doing some repair. It is true that North America is a “throw-away” society, but the time has come to change our way of life so that we can protect our environment. Every one of us should try our best.

1．The “Reduce” rule mainly requires(要求) us ________.

[　　]

A．to use things wisely

B．to cut down many trees

C．to use a lot of paper

D．to throw away your old clothes

2．What's the right order(顺序) of recycling coke cans?

[　　]

[　　]

3．The “Recover” rule mainly requires us ________.

[　　]

A．to throw waste things away

B．to cover waste things with earth

C．to get back the useful parts

D．to throw the whole things away

4．Which is the best way to do with your broken tables?

[　　]