中考真题2025山东省济宁市中考语法填空A篇-首款可降解植物书包问世
Many schoolbags are made from plastics and other things that could take hundreds of years to break down. In 2022, a research center ____1.____ (come) up with the world’s first biodegradable (可生物降解的) schoolbag.
The bag looks very common, but it is actually made from plants and other green waste. When students put it in a compost bin (堆肥桶), almost every part of the schoolbag ____2____ (turn) into soil (土壤) in 3 years. This makes it a much ____3__ (good) choice for our planet!