2019年mpa考试英语真题——连词443

{01}The little boy won"t go to sleep _____ his mother tells him a story.
A.or
B.unless
C.but
D.whether
解析：
本题选B。

{02}You"d better take an umbrella _____ it rains.
A.in case
B.unless
C.as long as
D.ever since
解析：
本题选A。