Jack packed all the things in a case,?

C.anxious to leave
"杰克把所有的东西打包进一个皮箱，急着想离开。"
形容词短语anxious to leave做伴随状语。

伴随状语
伴随状语出现的条件是一个主语发出两个动作或同一个主语处于两种状态，或同一个主语发出一个动作时又伴随有某一种状态。伴随状语的逻辑主语一般情况下必须是全句的主语，伴随状语与谓语动词所表示的动作或状态是同时发生的。伴随状语可以有以下几种表示方法：
一、使用分词形式
The dog entered the room, following his master.
这条狗跟着主人进了屋
The master entered the room,followed by his dog.
主人进了屋，后面跟着他的狗
二、用with复合结构
The little girls were playing with snow with their hands frozen red. 小女孩们在玩雪，手都冻红了
The workers went out of work, talking and laughing all the way工人们下班了，一路有说有笑
三、用独立主格结构
The little boy goes to school, the little dog accompanying him every day. 这小孩每天去上学，那条小狗陪伴着他
四、用形容词(短语)
Crusoe went home, full of fear。 克鲁索满怀恐惧地回家
Confident of the victory the players are fighting hard.
运动员们对比赛夺胜满怀信心奋力拼搏
The match will be broadcast live. 这场比赛将作实况转播
He left home young and came back old. 他少小离家老大回
五、用名词
He went away a beggar but retumed a millio