问题补充:
Now the air in our hometown is than it was before. Something must be done.
A. much better
B. more worse
C. more better
D. much worse
答案:
A. much better
B. more worse
C. more better
(答案→)D. much worse
解析:根据Something must be done“一些事必须被做”可知,我们的空气并不好,所以应该用worse;又因为worse本身就是比较级,不需要加more,但much可放在比较级前面,表示“多得多”。故本题选D .