1. 【2015•安徽】完形填空
阅读下面短文，从短文后各题所给的四个选项（A、B、C、和D）中，选出可以填入空白处的最佳选项。
In our modern world, when something wears out, we throw it away and buy a new one. The ____1____ is that countries around the world have growing mountains of ____2____ because people are throwing out more rubbish than ever before.
