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

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

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

1. A.
   very good
2. B.
   much better
3. C.
   rather bad
4. D.
   even worse