2019年mpacc考试英语真题——连词375

{01}He was about to jump into the river ________ his mother stopped him.
A.while  
B.when
C.as  
D.before
解析：
本题选B。

{02}One day Chuck is _______a flight _____the Pacific Ocean ______suddenly his plane crashes.
A.in, over, while  
B.on, across, when    
C.with, through, when  
D.on, across, while
解析：
本题选B。