40. What does the passage talk about?

• A、Warfare is a"law of nature". 
  
  

• B、Warfare is not a"law of nature". 
  
  

• C、Warfare controls human population. 
  
  

• D、None of the lowlier animals, except ants, practice warfare upon their own species. 
  
  

54. (    )

二、詞匯與語法知識: 共15小題; 每題2分, 共30分。從每小題的四個選擇項中, 選出最佳的一項。

6. It was (   ) comfortable temperature that we went to have a picnic on mountains. 

• A、so
  
  

• B、very
  
  

• C、really
  
  

• D、such