A policeman___the thief and catch him (knocked at/knocked out)

问题描述:

A policeman___the thief and catch him (knocked at/knocked out)
应该选什么?(今晚答出者加悬赏)
The manager knocked 10%___the charge.A:off B:over C:out D:of 选什么?

/knocked out
A off ,减去10%