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

[　　]

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

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