2019年mpa考试英语真题——连词623

{01}Perhaps the day will come _____ people will be able to breathe clean air in cities.
A.when
B.while
C.as
D.since
解析：
本题选A。

{02}____ it comes to traffic rules, I often come across such cases _____ the local drivers obviously know
 them but won"t follow them.
A.If; why
B.As; which
C.Once; as
D.When; where

解析：
本题选D。