【拓展归纳】
cut across 取捷径;抄近路 cut out 剪除；切掉；割掉
cut in 插嘴 cut down 看到；砍伤；砍死
cut back 修剪;减少;削减 cut up 切碎
9.He was in such a hurry that he bumped into/knocked into/came across an old lady.
knock into v.to meet unexpected撞上,偶遇
e.g.I knocked into an old friend of mine in the street the other day.
