2019年mba考试英语模拟题——连词925

{01} I was doing some shopping in the supermarket______ it suddenly occurred to me that I"d left my
 wallet at home.
A. when      
B. while      
C. until          
D. before
解析：
本题选A。

{02}At school, some students are active ______ some are shy, yet they can be good friends with one another.
A.while          
B.although        
C.so              
D.as
解析：
本题选A。