同学你好，该知识点来自沪江网校《葡萄牙语(0-B2)零基础至高级【学霸班】》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~
George and I looked around the hall seeing the snails crawling up on the walls.
and saw，这里是并列的动作，两个动作都很重要。

Some of them had already crawled on the ceiling.
on最好改成up，表示到……上面

Even so, I was unwillingly to touch those disgusting creatures again.
这里用unwilling形容词

What's worse, the marks led to the coat pockets made my flesh creep.
What's worse可以去掉，在书面语中不够正式
the marks on the pocket of my coat 可以这样表达

祝同学学习进步~