Question

6．Plastic bags are everywhere!Every day，we are handed countless plastic bags：when we go to grocery stores，clothing stores，book stores and restaurants．Yes，sometimes，they are  convenient，but most of the time，they are avoidable．A plastic bag is just not necessary for that apple you are about to eat or that soda you are going to drink right away．Consider these questions：
    Do I need to take as many plastic bags in supermarkets？
    Do I need a plastic bag for an item purchased that is already well packaged？
    Could I bring my own shopping bag when making purchases？
    Plastic bags are the cause of major environmental concerns．It is thought that an average person uses around 130 plastic bags per year．Using fewer plastic bags is a must in solving environmental problems．
Reasons why you should limit your use of plastic bags：
  1．Plastic bags account for a major part of our waste in landfills（垃圾填埋场）．Plastic
    bags are light and hard to contain．Because of this，plastic bags fly easily in wind，float along in the currents of rivers and oceans，and get caught in trees and fences．
  2．Plastic bags are made from a non-renewable natural resource（资源）：oil．Therefore，this contributes to the disappearance of our natural resources．
  3．Countless plastic bags end up in our oceans and cause harm to our sea life．Many sea animals and birds mistakenly eat and choke on plastic or become tied up in plastic bags that are floating around．
  4．There are many better alternatives to plastic bags．Paper bags hold more than plastic bags．But the best alternative to using plastic bags is using cloth bags．

46．What's the main idea of the first paragraph？A
A．Plastic bags are uncontrollable
B．Plastic bags are unnecessary．
C．Plastic bags are inconvenient
D．Plastic bags are dangerous．
47．Which of the following is NOT the reason for limiting the use of plastic bags？D
A．They speed up the disappearance of oil
B．They threaten the lives of sea animals．
C．They do harm to trees and fences
D．They pollute the environment．
48．The best thing people can do to help solve the plastic bag problem is toC
A．stop making plastic bags from oil
B．use paper bags instead of plastic bags
C．bring their own cloth bags when shopping
D．pick up plastic bags found in rivers and oceans．

Answer 1

分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了塑料袋对环境的污染越来越严重，带来许多环境问题，现在人们也意识到了环境保护的重要性，呼吁人们带自己的布袋购物．

解答 46．A．段落大意题．根据第一段we are handed countless plastic bags：when we go to grocery stores，clothing stores，book stores and restaurants可知第一段的主要思想是塑料袋是无法控制的；故选A．
47．D．细节理解题．根据文章可知限制使用塑料袋的原因是加快了石油的消失，威胁海洋动物的生命，和危害树木和篱笆等；故选D．
48．C．细节理解题．根据最后一段But the best alternative to using plastic bags is using cloth bags可知人们可以做的最好的事情以帮助解决塑料袋问题是带自己的布袋购物；故选C．

点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．