they had just _ the middle whe there came a great shout of warning behind them.

题目

they had just _ the middle whe there came a great shout of warning behind them.
A.stayed
B.reached
C.lain
D.climbed
顺便翻译一下``````
when there came

答案

reached
当他们听到身后传来很大声的警告时他们才到中点