短文改错（共10小题；每小题1分, 满分10分）
假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处,每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧）,并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线,并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均限一词。
2. 只允许修改10处,多者（从第11处起）不计分。
The “white pollution” problem was caused by used plastic is becoming increasingly serious, on which plastic shopping bags play an important role. In China about three billions plastic shopping bags are used every day, that results in a waste of resources and heavy environmental pollution. Lucky, the government has put a nationwide ban on the use of free plastic bags, demand that no stores and supermarkets should provide customers with free plastic bags after June 1, 2007. The rule will undoubtedly reduce use of plastic bags or promote the awareness of environmental protection. He is strongly suggested that everyone turns to cloth bags and shopping baskets.