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53. (    )

41. According to the passage, some doctors believe it is true that (   ). 

• A、you are healthy if cold-water swimming turns your skin color blue
  
  

• B、cold-water swimming causes more heart attacks in summer than in winter
  
  

• C、cold-water swimming can make the body temperature dangerously high
  
  

• D、Polar Bears are bears swimming in freezing water
  
  

9. In (   ), with a cigarette in her mouth. 

• A、did Lily go
  
  

• B、went Lily
  
  

• C、Lily went
  
  

• D、 Lily did go