_重庆成考网

From this passage，the pollution of noise_____．

• A、doesn’t matter much
  

• B、has become worse everywhere
  

• C、has become better in big cities

• D、has become better in villages

The passage is mainly about_____．

• A、a group of cold-water-swimming lovers
  

• B、the Polar Bears’life in New York
  

• C、doctors’ideas about cold-water swimming
  

• D、the requirements of the Polar Bear Club

51.__________,