2019年mba考试英语模拟题——连词839

I was making my chemistry experiment_____the bell rang for break.
A.when
B.while
C.as
D.for
{01}

解析：
本题选A。

{02}Mary made coffee ____ her guests  were finishing their meal.   
A.so that      
B.although    
C.while      
D.as if
解析：
本题选C。

{03}We must get up early tomorrow,_______we"ll miss the first bus to the Great Wall.  
A.so            
B.or            
C.but            
D.however
解析：
本题选B。