2019年mpa考试英语真题——介词和介词短语1078

{01}Dr Carl is an expert ______ the environment.
A.about
B.on
C.over
D.of
解析：
本题选B。

{02}There were no women in the committee _____ 1976, but now women are in a majority.
A.before to
B.previous to
C.ago
D.earlier
解析：
本题选B。