Styrofoam，orpolystyrene，isalight-weightmaterial，about95percentair，withverygoodinsulation（隔热）properties，accordingtoEarthsource．org．Itisusedinproductsfromcupsthatkeepyourdrinkshotorcoldtopackagingmat

Question

Styrofoam，or polystyrene，is a light-weight material，about 95 percent air，with very good  insulation（隔热） properties，according to Earthsource．org．It is used in products from cups that  keep your drinks hot or cold to packaging material that protects items during shipping．
    With the above good features，Styrofoam still enjoys a bad reputation．It cannot be recycled  without releasing dangerous pollution into the air．The U．S．Environmental Protection Agency says it is the fifth-largest creator of harmful waste．
    But now the common worms which are usually disgusting can come to the rescue，specifically，mealworms．Scientists from the U．S．and China have discovered that mealworms can digest plastic．One mealworm can digest a pill-sized amount of plastic a day．Study co-author Wei-Min Wu says that in 24 hours，the plastic is turned into carbon dioxide．
   Since Styrofoam has no nutrition at all，are the worms hurt by eating plastic？Much to the scientists'surprise，the study found that worms eating Styrofoam were as healthy as worms eating bran（谷糠）．
    The researchers will study the worm's eating habits and digesting system，looking to copy the plastic breakdown but on a larger scale．Once the way can be put into practice，it will make a revolutionary difference to the disposal of plastic．
"Solving the issue of plastic pollution is important"，says Wu，a Stanford University environmental engineering instructor．After all，our earth is small and landfill space is becoming limited with too much garbage waiting to be dealt with，he says．
    About 33-million tons of plastic are thrown away in the United States every year．Plastic plates，cups and containers take up 25 percent to 30 percent of space in America's landfills．One Styrofoam cup takes more than 1 million years to recycle in a landfill，according to Cleveland State University．

66．What do we know about Styrofoam？___
A．It can be used to cool drinks．
B．It is a weightless material．
C．It is harmful when recycled．
D．It is usually used on ships．
67．What can we infer from the third paragraph？___
A．Mealworms have amazing digesting power．
B．Mealworms are not bad in their nature．
C．Mealworms can rescue people's lives．
D．People misunderstood mealworms in the past．
68．Why will researchers study the worm's eating habits and digesting system？___
A．To find ways to help mealworms grow larger．
B．To imitate their ways of breaking down plastic．
C．To help develop their digesting ability．
D．To make sure of their safety after eating plastic．
69．In the future，plastic may be recycled___．
A．by raising amounts of mealworms    
B．by environmental engineering instructors
C．using a method inspired by eating mealworms 
D．without sending out dangerous pollution
70．What's the main idea of this passage？___
A．Styrofoam is widely used in daily life．
B．Mealworms are genius at eating plastic．
C．Plastic recycling may be no more a problem．
D．Plastic can be turned into carbon dioxide．

Answer 1

CABDC
66．答案 C．细节理解题；第二段第二句"It cannot be recycled  without releasing dangerous pollution into the air．"为双重否定，表达的是肯定的意思，即"它被回收会向空气中释放危险的污染"，故答案选C．
67．答案是A．推断题；根据第三段第二句"Scientists from the U．S．and China have discovered that mealworms can digest plastic．"可知，黄粉虫幼虫能够消化塑料，故推断它们有令人惊奇的消化能力，故选A．
68．答案是B．细节推断题；根据第5段中"looking to copy the plastic breakdown but on a larger scale期望模仿塑料的分解但是在更大的规模上"推断研究者是为了模仿这些虫子分解塑料的方式，故选B．
69．答案是D．推断题．文章介绍了一种能够消化分解塑料的黄粉虫幼虫，研究者期待者模仿它们的分解和消化的方式从而解决回收利用塑料对环境的污染，故推断一旦模仿成功对塑料的回收利用就不会危害环境，故选D．
70．答案是C．主旨大意题；文章中作者首先提出了问题--塑料的回收使用对环境造成污染；其次介绍了一种能消化分解塑料的虫子，并说明研究者期望通过理解和模仿从而最终解决塑料的回收使用对环境造成污染的问题；故说明也许塑料的回收利用不再是问题．故选C．