2019年mba考试英语模拟题——连词595

{01}_____ you have made a promise, you should carry it out.   
A.Once          
B.Until        
C.For      
D.While
解析：
本题选A。

{02}A new survey shows that 54 percent of Americans do not take prescription medicines ________
though they are important to their health.
A.as they instruct  
B.as were instructed
C.as to be instructed  
D.as instructed
解析：
本题选D。