同学你好，该知识点来自沪江网校《大学英语四级高效备考【2024年6月】》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~
It was a beautiful! 形容词前的a去掉
The grasses were so high that it reach my knee. high改成tall，reach用过去式
We couldn’t see the end of prairie. 可以改成The prairie seemed to stretch endlessly.
The people ,there, were very friendly,they invited us to eat cheese and mutton.
前两个逗号去掉，they前加and连接句子
Then,we watched a riding horse race,it was wonderful !
第一个逗号去掉，it前加and，逗号不能连接句子
we enjoyed a good time with pleasure. 直接说 I had a really enjoyable time!就可以

祝同学学习进步~