单选题 It is not easy to ______ oneself of his bad habits, just as the proverb says, "Old habits die hard".
【正确答案】 D
【答案解析】remove意为“去掉，消除”；kill意为“终止，灭绝”；dismiss意为“解散，开除”；rid意为“使摆脱，解除”。rid oneself of sth．是固定搭配，意为“摆脱，除去”。