2019年mba考试英语模拟题——连词560

{01}________time goes by, Mother"s hair has turned grey and the wrinkles on her face deeper.
A.As  
B.With
C.While      
D.Because
解析：
本题选A。

{02}Failure can be positive contribution to your life________you learn  how to use it.
A.since  
B.unless  
C.even if  
D.once
解析：
本题选D。

{03}Your natural hair color begins to fade________you grow older, and in time you grow grey.
[      ]
A.since  
B.when
C.while  
D.as
解析：
本题选D。