prevent sb.from doing = keep sb.from doing 阻止某人做某事;
区别是prevent sb.from doing 中的from 可以省略;
而keep sb.from doing 中的from 不可以省略.keep me from the cold ,还是prevent me from the cold ?这两个选项都有。。你能把原题完整打上去吗？如果单纯从选项来看的话，那只能选择prevent me from the cold ，因为我们更倾向于：keep me away from the cold. 字面意思："使我远离冷＂