2019年mpa考试英语真题——连词359

{01}They will come to help us with the harvest ______ they are busy tomorrow.    
A.even if        
B.however      
C.as though      
D.even although
解析：
本题选A。

{02}As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.
A .before
B.unless
C.since
D.until
解析：
本题选A。