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. Of all (   ) reasons for my decision to become a university professor, my father's advice was most (   ) important one. 

• A、the; a

• B、不填; a

• C、不填; the

• D、the; the

53. (      ) 

45. When is it bad to eat sweets and ice-cream?

• A、When we are hungry.
  
  

• B、When we want to.
  
  

• C、After the meal. 
  
  

• D、Before the meal.