2019年mpa考试英语真题——连词718

{01}Happy _____ they were, there was something missing.
A.if
B.when
C.since
D.as
解析：
本题选D。

{02}-Do you know about the accident which happened in the center of the city?    
-Yes. But it was some time            we realized the truth.
A.before
B.when
C.since
D.until
解析：
本题选A。