Now the air in our city is than it used to be. Something must be done to stop it. A. very

问题补充：

Now the air in our city is than it used to be. Something must be done to stop it.

A. very good

B. much better

C. rather bad

D. even worse

答案：

A. very good

B. much better

C. rather bad

D. even worse

解析：句意：现在我们城市的空气甚至比过去要糟。必须采取措施来阻止它。very good非常好；much better好得多；rather bad相当糟；even worse甚至更糟。由than知该用比较级。根据Something must be done to stop it可知该选D。