1.I came to a crossroads with a traffic light． I was alone on the road then, but ________ I drove up to the light, it turned red, and I braked to a halt．
【答案】as/when
【解析】as/when 句意：我来到了一个有交通信号灯的十字路口。当时我独自在公路上，但是当我开车到信号灯处时，它变红了，我踩刹车停了下来。设空处引导时间状语从句，表示“当……的时候”，故填as或when。
2.I’m a successful businessman now and I think about the troubles in life, I think about that little girl and the remarkable lesson about life that she taught me.
【答案】whenever/when
【解析】考查时间状语从句。此处表示"每当我想到生活中的麻烦",故用whenever。也可用when,表示"当……时"。
3. long as he works hard, I don’t mind when he finishes the experiment.
【答案】As/So
【解析】句意:只要他努力工作,我不介意他什么时候完成实验。as/so long as"只要"。
