2019年mpa考试英语真题——连词522

{01}This is an illness that can result in total blindness _____ left untreated.
A.after
B.if
C.since
D.unless
解析：
本题选B。

{02}Parents should take seriously their children"s requests for sunglasses _____ eye protection is necessary in
sunny weather.
A.because
B.though
C.unless
D.if
解析：
本题选A。