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47. Sarah said Abe loved her truly because (   ) .

• A、Abe saw her in the crowd though she tried to make herself small
  
  

• B、Abe didn't forget about his mother 20 years later
  
  

• C、Abe kissed her in front of everybody
  
  

• D、Abe said this to her himself
  
  

53. (     )

17. (   ) ! The subway is approaching. 

• A、Look out
  
  

• B、Look back
  
  

• C、Look up
  
  

• D、Look down