题目内容
【题目】—The air in Jinan used to be seriously polluted. But now it is really clean and fresh.
—Our government ________ much to improve it. Happiness is achieved through hard work.
A.doesB.didC.has doneD.will do
【答案】C
【解析】
句意:——济南的空气过去被严重污染。但现在它真的又干净又新鲜。——我们的政府已经做了很多改进。幸福是通过努力工作获得的。
A. does做,第三人称单数;B. did做,过去式;C. has done已经做了,现在完成时;D. will do将做,一般将来时。根据But now it is really clean and fresh.及下文Happiness is achieved through hard work.可知这里是用现在完成时态,其结构是have /has done的形式。根据题意,故选C。
练习册系列答案
相关题目