Helen __into the river but that I caught her.A had fallen B would fall C fell D would have fallen
问题描述：
Helen __into the river but that I caught her.A had fallen B would fall C fell D would have fallen
选哪个,为什么?
答
D 要不是我抓住海伦,她就已经掉进河里了
这是一个虚拟语气的题目,I caught her是一个过去事实,因此前面的“掉进河里”是一个跟过去相反的事实,相当于If I hadn't catch her, she would have fallen into the river