同学你好，该知识点来自沪江网校《英语零基础直达大学六级【全额奖学金班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
One winter cold morning,
改成On a cold winter morning

he noticed that the dogs were restless, so he guessed that there were visitors who have been trapped in the snow.
这句是单独的一句话。who have been是多余的，去掉，或者改成who had been

After returning the monastery, the monk called in eleven dogs and other monks and fetched a sledge.
returning后面加介词to

The monks approached him and the dogs dragged him out the ground.
out of 从……中出来

As the man was unconscious, the dogs used its temperature to be warm him
the dogs kept close to him so that he could feel the warmth 狗们紧挨着他，让他感到温暖

祝同学学习进步~