— Why didn't you stop her going swimming alone?
— She had left the room I had time to do it.
A. after
B. before
C. till
D. as
网友回答
A. after
(答案→)B. before
C. till
D. as
解析:考查before用法。在英语中before有多种不同的翻译方法,本句中的before翻译为:还没来得及…就…;before的基本含义为:在…之前;句意:—为什么你不阻止她单独出去游泳?—我还没来得及阻止她,她就离开了房间。故B正确。