I.语法填空
At one point along an open highway, I came to a crossroads with a traffic light. I was alone on the road by now, but 1 I drove up to the light, it turned red, and I braked to a halt. I look left, right, and behind me. Nothing. 2 a car, no suggestion of headlights, but there I sat, 3 (wait) the light to change, the only human being for at least a mile in any direction.