Don't throw away your old phones.You are actually throwing away real gold!In the smartphones，there are many useful things such as gold，silver and copper（鋼）.People can recycle them to make new electronics（電子器件）.
    But many people may not know this.In Australia alone there are more than 25 million unused mobile phones lying around.The gold in these phones can add up to a value of more than＄80 million（542 million yuan）.There are about 2 billion（十億）smartphone users around the world，who change their phones once every 11 months on average.In China，people generate（產生）80 million old phones every year.
    However，it's not easy to get the useful things out of the phones.Smartphones have not only useful things，but also harmful things.Guiyu，a small town in Shantou，Guangdong，is one of the world's biggest dumping grounds （垃圾傾倒場） for electronic waste.Many recycling center sin Guiyu simply break the old electronics and don't think about the pollution it causes.According to a local government report，81 percent of children in Guiyu are harmed by lead（鉛） poisoning.
    Veena Sahajwalle，a professor at Australia's University of New South Wales，has made a mini factory.It makes smartphone recycling cleaner and easier.The mini factory is very small and easy to move around.It breaks the phones and automatically（自動地） takes away the useful parts.That way，humans do not get poisoned.

（1）What do people usually do with their old phones？

A

A

A．Throw them away.
B．Make gold rings.
C．Make new electronics.
D．Clean the city's roads.
（2）How many old phones do people generate in China every year？

C

C

A．10 million.
B．25 million.
C．80 million.
D．2 billion.
（3）On average，how often do smartphone users change their phones？

C

C

A．Once a month.
B．Twice a month.
C．Once every 11 months.
D．Twice every 18 months.
（4）The kids in Guiyu get lead poisoning because

A

A

.
A．Guiyu is polluted by electronic waste
B．people in Guiyu like to throw away old phones
C．Guiyu has the world's biggest lead factory
D．Guiyu uses machines to recycle electronics
（5）What would be the best title for the text？

C

C

A．Old smartphones are very expensive
B．Protect ourselves from being harmed by pollution
C．Let's recycle our old smartphones
D．Smartphones in different countries