河北省正定县2015高考英语暑假练习（5）（答案或解析）
阅读下面短文，从每题所给的四个选项(A、B、C和D)中，选出最佳答案。
Disposing(处理)of waste has been a problem since humans started producing it.As more and more people choose to live close together in cities,the waste-disposal problem becomes Increasingly difficult.
During the eighteenth century,it was usual for several neighboring towns to get together to select a faraway spot as a dump si
