问题补充:
It worries our government a lot that the air in our city is than it used to be.
A. very good
B. much better
C. rather bad
D. even worse
答案:
A. very good
B. much better
C. rather bad
(答案→)D. even worse
解析:句意:它很担心我们的政府对于我们城市的空气会更遭比我们过去的空气。分析比较级的形式than因此用比较,只有第二项与第四项符合,但是前面提到的是担心,因此现在的空气比以前更不好,故选 D