I will tell you the truth about plastic bags－the positive and the negative sides and provide a solution to this problem. Whether it is a shopping bag, a food bag or a trash bag, they are all made of plastic bags. Grocery store owners are very generous in using plastic bags. They place the fruit in one bag and drop the box of milk in another. Ever wonder why?
The positive side of plastic bags
Grocery stores, shopping centres, and restaurants are not thrifty in using and giving out plastic bags because they cost no more than a cent each, while a paper bag costs four cents. Plastic bags are produced so cheaply and massively（大量地）that they are used by 80% of store owners. In addition, they are light and very easy to carry and store.
The production of plastic bags has increased greatly over the last 20 years and producers of plastic bags are making large profits. However, the negative side of plastic bags is becoming well-known. More people are now getting worried that the earth is becoming a victim of the plastic bag success story.
The negative side of plastic bags
While production and consumption（消费）of plastic bags is good for business, it is not so for our Mother Earth. They have resulted in an increase in the amount of litter found floating in water or in the streets where we live.
Plastic storage bags, after usage, usually go to landfills（垃圾填埋地）as trash bags. They make the oceans poison sea animals. They give off toxins（毒素）when burned. They simply pollute the ground, air and water.
That is the true cost of plastic bags, and it looks like it is more than a cent. These are very alarming concerns and proper action needs to be taken.
小题1:According to Paragraph 3, plastic bag producers ________.
A．are now worried that the earth will become a victim of plastic bags
B．don’t think they have done enough to popularize plastic bags
C．have not realized the harm of plastic bags
D．have succeeded in popularizing the use of plastic bags小题2:From the last three paragraphs, we learn that .
A．plastic bags harm the earth severely
B．most plastic bags are not made use of
C．the prices of plastic bags are reasonable
D．plastic bags are the leading polluter on the earth小题3:What will the writer most probably talk about in the following paragraph?
A．How plastic bags are produced.
B．How plastic bags are used.
C．How to popularize the use of paper bags.
D．How to solve the problems caused by plastic bags.
小题1:D
小题2:A
小题3:D
题目分析：本文主要讲述的是塑料袋的好处和不利之处。
小题1:D 推理题。根据本段Plastic bags are produced so cheaply and massively（大量地）that they are used by 80% of store owners. In addition, they are light and very easy to carry and store.可知塑料袋生产商已经成功地让塑料袋流行了。故D正确。
小题2:A 细节题。根据文章最后3段，尤其是文章倒数第二段Plastic storage bags, after usage, usually go to landfills（垃圾填埋地）as trash bags. They make the oceans poison sea animals. They give off toxins（毒素）when burned. They simply pollute the ground, air and water.可知塑料袋已经严重地污染了我们的地球。故A正确。
小题3:D 推理题。本文在最后主要讲述了塑料袋的不好的方面，接下来要解释的就是如何来解决这个问题。故D正确。
点评：本文主要讲述的是塑料袋的好处和不利之处。本文主旨鲜明,很容易在文中找到答案。做题时要注意文章的首段和每一段的首句或尾句，因为它们往往就是文章的主题句。阅读中要注意要点之间的关系。然后带着问题，再读全文，找出答题所需要的依据，完成阅读任务。