2. 外语
  3. One of the reasons tropical forests are being cut down so rapidly is demand for the hardwoods that grow there. Hardwoods, as the

One of the reasons tropical forests are being cut down so rapidly is demand for the hardwoods that grow there. Hardwoods, as the

admin2013-07-11  27
问题     One of the reasons tropical forests are being cut down so rapidly is demand for the hardwoods that grow there. Hardwoods, as their【C1】______suggests, tend to be denser and more durable than softwoods. But their unsustainable logging【C2】______not only forests but also【C3】______creatures and the future prospects of the people who lived there.
    It would be better to【C4】______softwood, which grows in cooler regions in【C5】______managed forests. Softwoods are fast-growing species that【C6】______80% of the world’s timber. But the stuff is not durable enough to be used outdoors【C7】______being treated with poisonous chemicals to protect it【C8】______insect pests. These chemicals eventually【C9】______out into streams and rivers, and the wood must be retreated. 【C10】______, at the end of its life, wood that has been treated with such kind of chemicals in this way needs to be disposed of【C11】______.
    One way out of this problem would be an environmentally【C12】______way of making softwood harder and more durable—something that a Norwegian company called Kebony has now【C13】______.
    Kebony stops wood from rotting【C14】______placing in a large container containing a 【C15】______called furfuryl alcohol(糖醇), which is【C16】______from the waste left over when sugarcane(甘蔗)is processed. The container is then pressurised, 【C17】______the liquid into the wood. Next the wood is dried and heated to 110℃, which makes the cell walls of the wood thicker and【C18】______.
    Of course, treating wood makes it more【C19】______. But because it does not need to receive【C20】______treatments, it should prove economical over its lifetime.
【C13】
选项 A、committed
B、manufactured
C、obtained
D、achieved
答案D
解析 考查动词辨析。此句话的逻辑宾语是something，指代开头的One way out of this problem。问题的解决方法应该是通过研究努力取得的，所以选achieved“得到，取得”。obtain也是“获得”之义，但宾语一般是客观存在的实际物体：manufacture“生产”用来搭配“解决方法”也不合适；commit“干(坏事)，犯(罪)”。
转载请注明原文地址:https://kaotiyun.com/show/SH07777K
0

大学英语四级

相关试题推荐
随机试题
最新回复(0)