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. Teachers recommend parents (   ) their children under 12 to ride bicycles to school for safety. 

• A、not allow
  
  

• B、do not allow
  
  

• C、mustn't allow
  
  

• D、couldn't allow
  
  

8. We should respect food and think about the people who don't have (   ) we have here and treat food nicely. 

• A、that
  
  

• B、which
  
  

• C、what
  
  

• D、whether