_广西成考网

Only then____that she had made a mistake．

• A、she realized
  
• B、did she realize
  
• C、had she realized
  
• D、she had realized

51.__________。

From the passage we know that education in the humanities and society____．

• A、has not changed much
  

• B、pay attention to students’studying instead of teachers’teaching
  

• C、is much more important than that of science and mathematics
  

• D、has become more practical than theoretical