单选题 When a man knows that he will be put into prison if he uses a potentially deadly object to rob or do harm to another person, he will think twice about it.

【正确答案】 D
【答案解析】deadly致命的,致死的。passive被动的;lifelong终身的;unhappy不幸福 的;fatal致命的,关键的。故答案为D。[句意]当一个人知道如果他用可能致死的物 体抢劫或伤害他人后将会进监狱,他会三思而后行。