1. They all leapt out of their sleeping bags and hurried outside.
他们全都跳出睡袋，跑到帐篷外。
知识点：leap out 引人注意
leap out of somewhere 从某地方跳出
谚语学习：Look before you leap.
三思而后行。
2. As soon as this was done, they cooked a meal over an open fire.
这件事刚刚做完，他们就在篝火上烧起了饭。
知识点1：复习“一……就”的短语： as soon as, the moment, the minute, the second, the instant, on doing等。
知识点2：this在此指代put up their tent“搭帐篷”一事，was done则是被动语态，表示“被做完”的意思。
知识点3：cook n.厨师v.做饭；杜撰，捏造；制造
cook up an excuse 编造借口
cook up a story 编故事
cook up trouble 制造麻烦
知识点4：an open fire 露天点燃的篝火
关于open的表达还有：
keep an open door 欢迎来客
camping in the open 露天宿营
with an open hand 慷慨大方
an open car 敞篷车
in the open air 在野外
sleep in the open 露宿
an open question 尚未解决的问题
an open market 露天市场
3. In the middle of the night, two boys woke up and began shouting.
午夜时分，有两个孩子醒了，开始大叫起来。
知识点1：in the middle of the night = at midnight在午夜
知识点2：学习以下反义词：
wake up 醒来→fall asleep 入睡
awake adj.醒着的→asleep adj.困倦的
