2019年mpa考试英语真题——连词426

{01}_____ you have heard the song, you"ll never forget it.
A.Unless
B.Although
C.Once
D.Until
解析：
本题选C。

{02}You will be successful _____ you have confidence. A.before
B.once
C.until
D.though
解析：
本题选B。