Question

3．Styrofoam，or polystyrene，is a light-weight material，about 95 percent air，with very good  insulation（隔熱） 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．a(chǎn)nd 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？C
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
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？B
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 recycledD．
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？C
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

分析 本文為科技說明文；文中首先說明塑料在日常生活中的重要作用，但是卻有著不好的名聲，因為在回收利用塑料是會產(chǎn)生污染；但是研究者發(fā)現(xiàn)一種蟲子能夠消化分解塑料；研究者期望通過理解和模仿從而最終解決塑料的回收使用對環(huán)境造成污染的問題．

解答 CABDC
66．答案 C．細(xì)節(jié)理解題；第二段第二句"It cannot be recycled  without releasing dangerous pollution into the air．"為雙重否定，表達(dá)的是肯定的意思，即"它被回收會向空氣中釋放危險的污染"，故答案選C．
67．答案是A．推斷題；根據(jù)第三段第二句"Scientists from the U．S．a(chǎn)nd China have discovered that mealworms can digest plastic．"可知，黃粉蟲幼蟲能夠消化塑料，故推斷它們有令人驚奇的消化能力，故選A．
68．答案是B．細(xì)節(jié)推斷題；根據(jù)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規(guī)模上"推斷研究者是為了模仿這些蟲子分解塑料的方式，故選B．
69．答案是D．推斷題．文章介紹了一種能夠消化分解塑料的黃粉蟲幼蟲，研究者期待者模仿它們的分解和消化的方式從而解決回收利用塑料對環(huán)境的污染，故推斷一旦模仿成功對塑料的回收利用就不會危害環(huán)境，故選D．
70．答案是C．主旨大意題；文章中作者首先提出了問題--塑料的回收使用對環(huán)境造成污染；其次介紹了一種能消化分解塑料的蟲子，并說明研究者期望通過理解和模仿從而最終解決塑料的回收使用對環(huán)境造成污染的問題；故說明也許塑料的回收利用不再是問題．故選C．

點評 閱讀要在整體理解文章的基礎(chǔ)上，在做細(xì)節(jié)題時根據(jù)題干定位細(xì)節(jié)，在語境中正確理解原句，然后對照選項做出合理的判斷；必要的時候要進行推理，透過句子表面看作者的真正意圖．如果是主旨大意的判斷要把握文章整體，避免以偏概全．