2019年mpa考试英语真题——副词55

{01}The book was written in  1946,         the education system has witnessed great changes.        
A.when                        
B.during which        
C.since then                    
D.since when
解析：
本题选D。

{02}China"s new food law provides for a food recall system________ producers have to stop production if their food isn"t up to standards.
A.where  
B.that
C.when  
D.which
解析：
本题选A。

{03}Saving and recycling are long-term projects _______ determination matters a great deal.
A.that            
B.which      
C.whose        
D.where
解析：
本题选D。