1 . When your pen is broken, the batteries (电池) in your toys run out, or you have some leftover food, what will you do with these things? You will probably throw them all into one bin. But actually, all of these pieces of rubbish need to be sorted (分类) separately.

Rubbish sorting is a big problem worldwide. In recent years, some Chinese cities have been working hard on it. Shanghai has worked with Alipay to create a “green account (账户)” service. Account owners get points by correctly sorting their rubbish. Through the Alipay app, they can exchange the points for milk, phone cards or other products. The city is asking all people living there to sort their rubbish into four groups: wet, recyclable, harmful and dry.

Wet waste is something you don't want but that pigs can eat. Plastics, glass, paper and other things that can be reused are recyclable waste. Harmful waste includes things like medicine, batteries and bulbs. Finally, any waste that’s not wet, recyclable or harmful will go in the “dry waste” bin.

Many other Chinese cities are also sorting their rubbish in this way. For example, Shenzhen has been doing this since 2012. Students there also receive waste-sorting guidebooks that they must study.

In fact, there are still many workers specially working for sorting rubbish by hand in China. There is still a long way to go. But it’s never too late for every Chinese to learn how to sort rubbish properly and protect the environment.

If you don't sort your rubbish, all of it will go to a landfill (垃圾填埋场) and be buried together.

These landfills can take up much ground that could be used for planting. The electronic waste you throw away, such as batteries or used mobile phones, can cause pollution. Other pieces of rubbish, like the metal part of a pen, can be used to make other things if they are properly recycled.

1. Shanghai creates the “green account” service in order to ________.

A．work with the Alipay app.	B．punish those who don't sort rubbish.
C．exchange useful products.	D．encourage people to sort their rubbish.

2. After drinking up the milk, you can put the milk box into a “________ waste” bin.

A．wet.	B．recyclable.
C．harmful.	D．dry.

3. The last paragraph is mainly about ________.

A．why we should sort rubbish properly.

B．where our rubbish can be dealt with.

C．how some waste can be recycled.

D．what waste can cause pollution.

4. Which is NOT TRUE about rubbish sorting in China according to this passage?

A．There is still a long way to go in rubbish sorting.

B．There are many workers sorting rubbish by hand.

C．Students have to take waste-sorting classes in school.

D．Shenzhen has been doing rubbish sorting for nine years.