2019年mpacc考试英语真题——连词697

{01}We must take measures to protect the endangered wildlife ______ itis too late.  
A.before        
B.as long as      
C.now that      
D.unless
解析：
本题选A。

{02}It has been three months ________the famous painting was stolen. 
A.before  
B.since    
C.until    
D.unless
解析：
本题选B。