----I’vehadabadcoughrecently.  ----Metoo.I’veneverexpe...

問題詳情：

 ---- I’ve had a bad cough recently.

   ----Me too. I’ve never experienced ______ of air pollution in cities before.

A. an acute problem                 B. a more acute problem  

C. a most acute problem                   D. the most acute problem   

【回答】

B

知識點：其他

題型：選擇題