52.

47. What did Dr. Harris Cooper find in his study?

• A、Kids love reading more after the summer.
  
  

• B、Kids show a special interest in math after the summer.
  
  

• C、Kids' math skills become weaker after the summer.
  
  

• D、Kids have a lot of fun in the summer.
  
  

9. Tommy is very ______ in what the teacher said in class yesterday. 

• A、 Interested
  
  

• B、interests
  
  

• C、
  interest
  
  
  
  

• D、interesting