2019年mpa考试英语真题——连词446

{01}Last month I came to Britain. My English has improved a lot _____ I use it all the time. A.since
B.while
C.when
D.as
解析：
本题选D。

{02}____ most of the earth"s surface is covered by water, fresh water is very rare and precious.
A.As
B.Once
C.If
D.Although
解析：
本题选D。